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7623057 |
Analog digital converter
In one aspect, provided is an A/D converter including: a plurality of capacitor networks each including a first switch group a capacitor group; a second switch group; and a plurality of reference...
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7616145 |
Reference circuits for sampled-data circuits
A switched capacitor circuit includes a first level-crossing detector to generate a level-crossing detection signal when an input signal crosses a first predetermined level. A first waveform...
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7612703 |
Pipelined analog-to-digital converter with calibration of capacitor mismatch and finite gain error
The present invention relates to an analog-to-digital converter, especially to a pipelined analog-to-digital converter with calibration of capacitor mismatch and finite gain error. Comparing with...
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7612700 |
Pipeline type A/D converter apparatus provided with precharge circuit for precharging sampling capacitor
In a pipeline type A/D converter apparatus including A/D converter circuit parts connected in cascade with each other and A/D converting a sample hold signal in a pipeline form, each A/D converter...
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7609184 |
D-A convert apparatus and A-D convert apparatus
Provided is a D-A conversion apparatus that outputs an analog output voltage according to digital input data, which includes a capacitance array main D-A converter that supplies a main voltage...
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7605732 |
Systems and methods for kickback reduction in an ADC
Various systems and methods for analog to digital conversion are disclosed. For example, some embodiments of the present invention provide analog to digital conversion systems. The analog to...
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7602325 |
Sigma delta analog to digital converter with internal synchronous demodulation
A sigma-delta (ΣΔ) analog to digital converter with internal synchronous demodulation responsive to a sample clock, reference clock and conversion clock including a sample switching circuit...
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7598897 |
Superconductor analog-to-digital converter
A superconducting Analog-to-Digital Converter (ADC) employing rapid-single-flux-quantum (RSFQ) logic is disclosed. The ADC has only superconductor active components, and is characterized as being...
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7589660 |
Low power analog to digital converter
A pipelined analog to digital converter comprises N stages, wherein N is an integer greater than one. A sample and integrate circuit communicates with at least two stages of the N stages. The...
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7589659 |
Successive approximation analog to digital converter
A successive approximation analog to digital converter comprising a plurality of capacitors which during a successive approximation conversion are selectively connectable to a first reference or a...
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7583166 |
Inductor Q factor enhancement apparatus has bias circuit that is coupled to negative resistance generator for providing bias signal
The present invention provides an apparatus for enhancing Q factor of an inductor. The apparatus includes a negative resistance generator coupled to the inductor for providing a negative...
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7573413 |
Electronic circuit protecting against the effect of injection current and analog to digital conversion circuit
An electronic circuit includes a transmission circuit transmitting an input signal of a first node as an output signal of a second node in response to a control signal and a discharge circuit...
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7570192 |
Charge-domain pipelined analog-to-digital converter
An ADC implementation of a bucket brigade type charge transfer pipeline using Metal Oxide Semiconductor (MOS) Bucket Brigade Devices (BBDs) that can be used in Analog-to-Digital (A/D) converters...
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7561086 |
Electronic circuit for the analog-to-digital conversion of an analog input signal
Electronic circuit for the analog-to-digital conversion of the alternative current (AC) component of an analog input signal. The electronic circuit has a coupling device with an input and an output...
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7554480 |
Analog/digital converter, illuminance sensor, illumination device, and electronic device
An analog/digital converter has a charge circuit that has a charge capacitor storing an electric charge commensurate with an input current, and first and second discharge circuits that discharge...
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7551116 |
Semiconductor integrated circuit performing a voltage comparison and preventing deterioration of a voltage comparison accuracy
A semiconductor integrated circuit includes a differential amplifier circuit receiving first and second input voltages, a latch circuit comparing a voltage received from a first output terminal of...
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7541964 |
Analogue/digital converter microelectronic device for equalising charges
The disclosure relates to a microelectronic image sensor device comprising: at least one detector formed by at least one photo-detector element, at least one integration capacitor associated to the...
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7538710 |
Device for measuring an electric charge in digitized form
The present invention relates to a device for measuring an electric charge in digitized form. The digitized value is coded on N bits. The device has at least a battery of N capacitors ( 1, 11 )...
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7535400 |
Analog error correction for a pipelined charge-domain A/D converter
A technique for correcting errors in Bucket Brigade Device (BBD)-based pipelined devices, such as Analog-to Digital Converters (ADCs). The gain between pipeline stages is desired to be a specific...
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7528761 |
Analog/digital conversion using successive approximation and redundant weighting
Illustrative binary networks for analog/digital converters are described. For instance, an analog/digital converter may operate in accordance with a principle of successive approximation, and may...
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7522086 |
Reference circuits for sampled-data circuits
A switched capacitor circuit includes a first level-crossing detector to generate a level-crossing detection signal when an input signal crosses a first predetermined level. A first waveform...
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7518539 |
Concurrent correlated double sampling and analog-to-digital conversion
For signal processing such as in an image sensor, a CDS (correlated double sampling) unit generates a first CDS signal from a first set of input signals at a predetermined node. In addition, a...
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7511648 |
Integrating/SAR ADC and method with low integrator swing and low complexity
A reconfigurable circuit ( 10 ) includes an integrator ( 30 ) having switches (SW 1 - 6 ) for selectively coupling input capacitors (C 0,1,2,3,6,7 ) and integrating capacitors (C 4,5 ) to terminals...
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7504977 |
Hybrid delta-sigma/SAR analog to digital converter and methods for using such
Various systems and methods for capturing data are disclosed. For example, some embodiments of the present invention provide methods for performing a first analog to digital conversion using a...
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7501974 |
Analog digital converter
An analog/digital converter for converting an analog signal to a digital output code includes a local digital analog converter including a segmented array. The segmented array includes upper and...
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7482966 |
Algorithm analog-to-digital converter
Provided is an algorithm analog-to-digital converter (ADC). The algorithm ADC obtains two digital outputs through different capacitor connections for one analog input signal and adds the digital...
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7479910 |
Capacitive digital-to-analog converter reset in an implantable medical device analog-to-digital converter
In general, this disclosure describes techniques for capacitive digit-to-analog converter (CAPDAC) resetting in an implantable medical device (IMD) analog-to-digital converter (ADC). The CAPDAC of...
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7477180 |
Noise shaping comparator based switch capacitor circuit and method thereof
A noise shaping comparator based switch capacitor (CBSC) comprises a comparator, a charge pump, a plurality of capacitors, and a plurality of shufflers. Each shuffler is controlled by a logical...
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7474241 |
Delta-sigma modulator provided with a charge sharing integrator
An analog-digital delta-sigma converter includes a plurality of continuous time integrators for performing a delta-sigma modulation. Each integrator includes at least one charge sharing integrator...
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7454967 |
Signal conditioning methods and circuits for a capacitive sensing integrated tire pressure sensor
A tire pressure monitoring system is provided that includes a switched capacitor circuit having a clock with two non-overlapping clock phases that control a state of analog switches of the switched...
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7453389 |
Correlated double sampling ping-pong architecture with reduced DAC capacitors
A method and apparatus can be arranged with a correlated double sampler circuit (CDS) for processing an output signal from an imaging device such as a charge-coupled device (CCD) image sensor. The...
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7450048 |
Error reducing comparator-based switch capacitor circuit and method thereof
An error reducing comparator based switch capacitor (CBSC) circuit comprises: a comparator of a substantial offset, a charge pump controlled by an output of the comparator, and a plurality of...
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7450041 |
Error cancelling comparator based switch capacitor circuit and method thereof
An error canceling comparator based switch capacitor (CBSC) circuit cyclically works through multiple phases including a sampling phase and a transfer phase. During the sampling phase, an input...
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7446686 |
Incremental delta-sigma data converters with improved stability over wide input voltage ranges
A method of operating a delta-sigma data converter includes receiving an input signal at an input of a delta-sigma modulator having a loop filter including a plurality of integrator stages, a...
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7443333 |
Single stage cyclic analog to digital converter with variable resolution
A converter ( 200 ) adapted to convert an analog input signal into a digital output signal includes an analog input terminal ( 205 ) for receiving the analog input signal, a Redundant Signed Digit...
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7439892 |
Variable voltage generator for delta-sigma modulators
A modulator integrator circuit includes an amplifier having a capacitive feedback connection, a variable voltage generator, a fixed voltage reference, and a capacitor having a first plate and a...
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7439889 |
AD converter
The ΔΣ AD converter includes: a sampling section for sampling an input signal at each cycle Ts; an AD conversion section for performing AD conversion of the input signal; a DA conversion section...
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7436344 |
Pipeline A/D converter
The present invention provides a pipeline A/D converter having resolution, allowable conversion processing rate and power consumption satisfying the requests of a system incorporating the pipeline...
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7436341 |
Digital/analog converting apparatus and digital/analog converter thereof
A digital/analog converting apparatus and digital/analog converter are provided. The digital/analog converter includes an operational amplifier, a first filter, a first switch, a second filter, a...
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7429946 |
Capacitor averaging converter
A capacitor-averaging pipeline analog-to-digital converter has a plurality of stages. Each of the plurality of stages has a first switched capacitor circuit and a second switched capacitor circuit...
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7423573 |
Architecture combining a continuous-time stage with a switched-capacitor stage for digital-to-analog converters and low-pass filters
A digital to analog converter (DAC) includes a first continuous-time stage that receives an input signal associated with a digital signal and performs continuous-time digital-to-analog conversion...
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7414564 |
Enhanced-accuracy converter stages for pipelined signal converter systems
Converter systems are provided which complement sample capacitors in at least one converter stage with replica capacitors. The replica capacitors are switched to receive replica charges from the...
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7414560 |
Wireless communication system including an audio underflow protection mechanism operative with time domain isolation
A wireless communication device reduces undesired audio underflow in a digital to analog receive path that employs time domain isolation. One or more buffers in the receive path receive processed...
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7414556 |
Analog-to-digital converter
The invention relates to signal processing circuits, analog-to-digital conversion circuits (A/D conversion circuit) and track and hold and sample and hold circuits. A circuit transfers charge from...
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7403151 |
Switch control circuit, ΔΣ modulation circuit, and ΔΣ modulation AD converter
A switch control circuit turns on/off second and third switches, while turning off/on first and fourth switches, in a complementary manner in an integrator constituted by using a switched capacitor...
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7403150 |
Analog-to-digital converter architecture using a capacitor array structure
An analog-to-digital converter architecture is described. An analog-to-digital converter circuit includes a switched capacitor circuit structure to receive an input voltage signal and one or more...
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7391354 |
Semiconductor integrated circuit
One input terminals of switches respectively coupled to capacitors of a capacitance array type D/A converter configured as a main DAC are coupled to a first external terminal of an IC. On the other...
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7385547 |
Minimized differential SAR-type column-wide ADC for CMOS image sensors
An analog-to-digital converter comprising a minimal amount of circuitry for conversion of an input analog signal to a series of digital bits. A differential comparator is provided for generating...
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7382302 |
A/D converter with voltage generation circuits
An A/D converter has a first voltage generation circuit, a second voltage generation circuit, a comparator, first and second switch circuits connected in series between an input terminal of an...
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7375666 |
Feedback topology delta-sigma modulator having an AC-coupled feedback path
A feedback topology delta-sigma modulator having an AC-coupled feedback path reduces signal level in the loop filter, easing linearity requirements and reduces capacitor size requirements for the...
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