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7623052 |
Strong short-pulse interference detection method
A system for detecting interference includes an automatic gain control (AGC) module, a peak detection module, and a control module. The AGC module selectively generates a gain-locked signal when an...
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7605731 |
Signal processor with a signal strength detection circuit that is coupled to a loop of an analog to digital converter
A signal processing circuit has an analog to digital converter ( 31 ) for providing a digital signal to a processor ( 15 ) from an analog input signal that is susceptible to variations in signal...
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7605730 |
Analog-digital converting apparatus and radio communication terminal
An analog-digital converting apparatus includes: an analog-digital converting unit that performs a conversion from an analog input signal into a digital output signal; a buffer unit that temporary...
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7602322 |
Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device
An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol...
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7589649 |
Apparatus, method, and system for correction of baseline wander
Apparatuses, methods, and systems for compensating baseline offset in a read channel of an analog storage device. The apparatus generally includes an AC-coupling circuit configured to transfer an...
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7583213 |
Signal processing system capable of changing signal levels
A signal processing system for changing a level of an input signal to generate an output signal is disclosed. The signal processing system includes a shifter, a sigma-delta modulator, and a level...
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7576673 |
Increasing the dynamic range of pulse width modulation in analog to digital converters
This disclosure relates to adjusting a limit cycle frequency of a pulse width modulation in an analog to digital converter as a function of an input signal level to increase dynamic range.
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7576665 |
System and method for receiving analog and digital input
A system and a method are provided for receiving analog and digital audio input via a single audio input connector. The method includes receiving an input signal from a single audio input...
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7573410 |
Gain step calibration in a mobile cellular transmitter
A technique to utilize digital gain control to fine adjust gain for one or more analog gain steps of an analog circuit. A gain step calibration procedure is utilized to set the digital gain within...
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7557741 |
Overload detection unit with signal strength indicator to indicate an overload condition
A device is for digitally processing an input signal that is susceptible to variations in signal strength. The signal ( 48 ) is analog to digital converted into a bitstream signal ( 47 ), the...
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7545299 |
Analog front end device
The invention discloses an analog front end device includes a calibration unit and at least a conversion circuit. The conversion circuit includes a clamper, a multiplexer, an voltage buffer and an...
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7541956 |
Inverter system with variable input gain apparatus and method for the same
An inverter system includes a comparator unit receiving an analog input voltage signal and compared with at least one threshold voltage value to determine a voltage range of the analog input...
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7532869 |
Automatic power level control circuit for a transceiver device
An automatic power level control circuit provides output power control of a transmitter device as used in wireless LAN applications in that an output signal is detected and a corresponding control...
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7525462 |
Gain control for interleaved analog-to-digital conversion for electronic dispersion compensation
Embodiments include a system for performing dispersion compensation on an electromagnetic signal received over a communication channel, the electromagnetic signal bearing information at a symbol...
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7522885 |
Method and apparatus for continuously controlling the dynamic range from an analog-to-digital converter
A method for continuously determining the required dynamic range for an analog-to-digital converter by determining the received signal strength and using this received signal strength value in...
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7522202 |
Image sensor and digital gain compensation method thereof
An image sensor and digital gain compensation method thereof. The image sensor comprises a variable amplification device for amplifying an inputted analog image signal as a variable first gain...
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7504974 |
Selecting circuit
A selecting circuit having minimal signal distortion caused by non-linearity of semiconductor switching elements includes a plurality of circuit groups each comprising an input terminal (INa);...
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7504973 |
Gain-variable analog/digital converter, gain adjustment method for gain-variable analog/digital converter, and system including gain-variable analog/digital converter
Voltage values at a high-voltage side and a low-voltage side of a reference voltage are generated on the basis of a current outputted from a current source circuit having an adjustable current...
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7492847 |
Analog front end circuit with automatic sampling time generation system and method
An automatic clock generation system is used for automatically outputting a sampling signal and a holding signal to an analog front end circuit and for sampling the analog signal. The clock...
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7492295 |
Self-adapting tracking analogue-to-digital converter and RF transmitter
A self-adapting analogue-to-digital converter includes a forward path with a voltage divider coupled to a digital integrator. In a feedback path, a scaler is connected to a digital-to-analogue...
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7492294 |
Receiving method with digital level adjustment in the analog section and incremental level change in the digital section
In an analog receiving section of a receiving device, the level of a received signal is adjusted by a first correction factor corresponding to a first digital level correction signal. Following...
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7482958 |
OFDM receiver
The present invention provides an OFDM receiver having a level control section comprising comparators which respectively compare a first signal outputted from an ADC with threshold values, counters...
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7463180 |
Analog to digital conversion apparatus
An up-converter 124 frequency-up-converts an analog signal Sm. A down-converter 121 frequency-down-converts analog signal Sm. A signal selection block 125 selects one of the...
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7460049 |
Power-to-digital converter
A power-to-digital converter (PDC) converting a signal power to digital code. The PDC comprises a power detector, an analog-to-digital converter (ADC), and a timing and logic control circuit. The...
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7446690 |
Apparatus and method for implementing an analog-to-digital converter in programmable logic devices
An apparatus and method for providing an analog-to-digital converter (ADC) in programmable logic devices is disclosed. A plurality of multi-purpose input/output (I/O) blocks is configured to...
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7446685 |
Read signal processing circuit, read signal processing method, and optical disc drive
The present invention provides a read channel and a drive capable of suppressing deterioration in performance of a PLL and a Viterbi decoder by using a DC component eliminating means capable of...
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7446684 |
Readout circuit for an image sensor and analog-to-digital converting method thereof
A readout circuit is adapted for receiving a line analog image signal from an image sensor array of an image sensor. The readout circuit includes an amplifying unit, an m-bit analog-to-digital...
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7436334 |
Amplifier, analogue to digital converter, methods of amplifying and of converting an analogue input signal to a digital output signal and of producing a mineral hydrocarbon fluid
Amplifier comprising an input signal node for conveying an input signal having an input signal value and an output signal node for conveying an output signal having an output signal value....
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7429943 |
Analog to digital (A/D) conversion circuit have a low dynamic range A/D converter
A low-power, high-dynamic range, analog-to-digital (A/D) conversion circuit for converting an analog signal to a digital signal having a controllable amplifier for amplifying the analog log signal...
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7423570 |
DA converter, AD converter, and semiconductor device
A DA converter includes a first DA conversion section for obtaining an analog output signal in accordance with a digital input signal value, and a second DA conversion section for obtaining an...
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7408493 |
Systems and methods for automatic gain control
Systems and methods for automatic gain control are disclosed. In one aspect of the invention, a system is provided that comprises a programmable gain amplifier that amplifies an input signal based...
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7408489 |
Method and system for mixed analog-digital automatic gain control
Aspects of the invention provide a method and system for a mixed analog-digital automatic gain control. The received analog signal is amplified by the analog amplifier and then converted to a...
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7405683 |
Extending the dynamic range in an energy measurement device
An apparatus for measuring energy usage. The apparatus can include an amplifier having a plurality of gain stages and the amplifier can be for receiving an input signal. The apparatus can also...
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7403010 |
Adaptive dynamic range receiver for MRI
A receiver for a resonance signal of a magnetic resonance imaging system generates a baseband signal for image processing by dividing a raw resonance signal among multiple parallel channels, each...
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7397403 |
Range compression in oversampling analog-to-digital converters using differential input signals
An analog-to-digital converter according to the invention is provided. The analog-to-digital converter preferably includes an analog input signal, a first reference signal, a second reference...
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7394417 |
A/D converter
In an A/D converter, each preamp 102 includes a preamp gain adjusting circuit 109 . The preamp gain adjusting circuit 109 suppresses the gain of the preamp 102 and restricts a...
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7391452 |
Successive approximation calibration apparatus, system, and method for dynamic range extender
A gain characteristic correctable dynamic range enhancement system (DRES) receives input signals from an imager device connected to a correlated double sampling (CDS) circuit for receiving the...
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7388535 |
Digitizing front end for optical receiver
A sampled-data-integrating front end is employed to convert an optical signal to a digital electrical signal. The front end includes a photodetector and an array of parallel conversion circuits,...
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7388529 |
Interference detection using a moving window
A system for detecting interference includes an automatic gain control (AGC) module, a digital signal processing (DSP) module, and a control module. The AGC module selectively generates a...
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7382296 |
System for mixed analog-digital automatic gain control
Aspects of the invention provide a system for a mixed analog-digital automatic gain control. The received analog signal is amplified by the analog amplifier and then converted to a digital value by...
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7375665 |
Image processing method and analog front end circuit
An image processing system includes a charge-coupled device sensor having a wide input dynamic range, and an analog front end circuit coupled to the charge-coupled device sensor. The front end...
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7369073 |
Microscopy system and recording method for visualizing fluorescence
An image sensor and a circuitry associated with the image sensor is used for recording a series of fluorescence images. The image sensor comprises a plurality of pixels for accumulating charges...
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7365665 |
Photodiode digitizer with fast gain switching
An optical receiver and method of operating therfor. A photodiode converts a received optical signal to an electrical signal, which is provided to both high gain and low gain signal paths. First...
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7365664 |
ADC with dynamic range extension
ADC circuitry has a first programmable gain amplifier to amplify an analog input, a first analog to digital converter coupled to an output of the first amplifier, a second programmable gain...
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7358879 |
ΔΣ modulator system with start up transient suppression
A ΔΣ modulator system with start up transient suppression includes a ΔΣ analog to digital converter having predetermined internal signal limits; an envelope control circuit for attenuating the...
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7352310 |
Receiving device and automatic gain control method
A receiving device includes a receiver; a frequency converter; an A/D converter; and a digital signal processor, wherein the A/D converter includes a variable gain amplifier adjusting a signal...
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7342529 |
Analog-to-digital-converting and suppressing system
A system for converting analog wanted signals to digital wanted signals includes an analog filter, an analog-to-digital-converter, and a compensator. The analog filter at least partly suppresses...
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7333038 |
Eliminating the effects of the temperature coefficients of series resistance on temperature sensors
An embodiment of the present invention is directed to a method for reducing the effects of temperature coefficients of series resistance in a temperature sensing circuit having a temperature...
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7327294 |
Gain compensation based on a first gain factor and a second gain factor with time-varying compensation
An automatic gain control circuit has a gain determination circuit (B 2 ) which determines a first gain factor (g), and a first gain controller (B 3 ) which controls an amplitude of an input signal...
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7321324 |
Unconditionally stable analog-to-digital converter
In one embodiment, the present invention includes a delta-sigma modulator formed of a loop filter coupled to receive an incoming signal, and a quantizer coupled to the loop filter to receive an...
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