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6985031 |
Semiconductor integrated circuit
A semiconductor integrated circuit is provided comprising a first amplifier circuit which receives a first potential and then supplies a current to an output terminal; a second amplifier circuit...
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6985036 |
Digitally controlled transconductance cell
A digitally controlled transconductance cell includes a differential transistor pair coupled to load elements (either passive or active with resistive or impedance loads) and a variable bias...
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6985038 |
Operational amplifier generating desired feedback reference voltage allowing improved output characteristic
A voltage setting circuit includes a voltage setting region setting a voltage level corresponding to a maximum value in amplitude of a signal output from an OTA circuit, a voltage setting region...
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6982597 |
Differential input circuit
A differential input circuit comprising only low withstand voltage transistors, which reliability is not affected even if a high power supply voltage is used. The first and second clamp circuits...
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6982596 |
Operational transconductance amplifier and AGC amplifier using the same
In an operational transconductance amplifier (OTA), resistors are bridge-connected to source terminals of MOSFETs that form a differential pair of the OTA. Capacitors are connected in parallel...
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6980050 |
Differential amplifier and comparator using the same
A differential amplifier. A differential pair constructed by a first transistor and the second transistor receives differential input signals. The gate terminals of a third and fourth transistor...
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6975168 |
Drive circuit
The present drive circuit includes: a first N-type transistor connected between a power supply potential line and an output node; a P-type transistor connected between the power supply potential...
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6972625 |
Variable transconductance variable gain amplifier utilizing a degenerated differential pair
Continuously tuning a transconductance. Coupling a degeneration resistance from a first source of a first transistor in a differential pair of transistors to a second source of a second transistor...
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6972623 |
Differential amplifier without common mode feedback
A differential amplifier without common feedback is disclosed. The amplifier has a low gain fully differential amplifier and a high gain fully differential amplifier connected in parallel with the...
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6970152 |
Stacked amplifier arrangement for graphics displays
A column driver for a graphics display has reduced power consumption by sharing power between upper and lower column amplifiers. The upper column amplifier operates over an upper supply range,...
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6970043 |
Low voltage, low power differential receiver
A folded common cascode circuit with symmetric parallel signal paths from the differential inputs to a single ended output provides a low skew, low jitter, low power, high speed differential...
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6967515 |
Single-ended to differential conversion circuit with duty cycle correction
A circuit to provide a differential signal output in response to a single-ended signal input, the circuit allowing for a wide common-mode input signal by providing complementary amplifier structures.
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6967532 |
Offset-compensated self-biased differential amplifier
An apparatus comprising a differential amplifier having a first input coupled to receive a voltage reference signal, a second input and an output. The apparatus also includes an inverter whose...
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6963245 |
System and method to accelerate settling of an amplifier
A system and method are used to accelerate settling or steady state of an amplifier in an amplifier system. This is used to ensure the amplifier reaches steady-state within a specified time period...
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6958651 |
Analog circuit and display device using the same
The invention provides an analog circuit that decreases an effect of variation of a transistor. By flowing a bias current in a compensation operation, a voltage between the gate and source of the...
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6956434 |
MOSFET well biasing scheme that mitigates body effect
A biasing scheme for a MOSFET that mitigates the MOSFET body effect. The biasing scheme can be realized replicating the voltage at the source terminal of a MOSFET and applying this replicated...
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6952134 |
Protection circuit for extending headroom with off-chip inductors
A protection circuit for extending the dynamic range of an amplifier circuit is described. Off-chip impedances, such as inductors, cause the output of the circuit to swing above and below the bias...
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6947720 |
Low noise mixer circuit with improved gain
A mixer circuit of the present invention includes a gain stage configured to receive a first signal and a modulated bias current, and in accordance therewith, produce an output signal, the gain...
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6937098 |
Translinear amplifier
In a translinear amplifier, where the output voltage difference is kept at the same relative difference as the input voltage difference and which is normally formed by two current balancing...
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6937099 |
OP-AMP CONFIGURABLE IN A NON-INVERTING MODE WITH A CLOSED LOOP GAIN GREATER THAN ONE WITH OUTPUT VOLTAGE CORRECTION FOR A TIME VARYING VOLTAGE REFERENCE OF THE OP-AMP, AND A METHOD FOR CORRECTING THE OUTPUT VOLTAGE OF SUCH AN OP-AMP FOR A TIME VARYING VOLTAGE REFERENCE
A circuit ( 1 ) comprising eight DACs ( 2 a to 2 h ), the analog outputs of which are applied to the non-inverting inputs ( 6 ) of corresponding op-amps ( 7 a to 7 h ) for gaining up the analog...
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6933781 |
Large gain-bandwidth amplifier, method, and system
An amplifier includes multiple stages. Early stages of the multi-stage amplifier have low gain and preserve bandwidth.
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6933782 |
Degenerative inductor-based gain equalization
Described are high-speed parallel-to-serial converters. The converters include data combiners with differential current-steering circuits that respond to parallel data bits by producing...
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6930550 |
Self-biasing differential buffer with transmission-gate bias generator
A self-biasing differential buffer generates a self-bias voltage from its inputs. A first amplifier receives a first input signal on gates of four transistors—p and n-channel drive transistors in...
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6924702 |
Low supply voltage and self-biased high speed receiver
A low supply voltage and self-biased high speed receiver comprising both thin and thick gate oxide MOSFETs in deep submicron technology. The receiver operates with an IO supply voltage higher than...
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6922085 |
Comparator and method for detecting a signal using a reference derived from a differential data signal pair
A comparator and method for detecting a signal using a reference derived from a differential data signal pair improves performance of an interface. A differential pair of data signals and at least...
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6920187 |
Constant delay zero standby differential logic receiver and method
A differential receiver circuit on an integrated circuit consumes substantially no standby power, has constant propagation delay regardless of the input common mode bias, has acceptable common mode...
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6919767 |
Circuit arrangement for low-noise fully differential amplification
The invention relates to a circuit for low noise, fully differential amplification. A feedback signal ( 121 ) is detected in a differential output step of the differential amplification circuit by...
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6919766 |
Operational amplifier circuit
An operational amplifier circuit includes a first differential pair, which includes first and second transistors, and a second differential pair, which includes third and fourth transistors. A...
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6911858 |
Comparator with offset canceling function and D/A conversion apparatus with offset canceling function
A comparator with an offset canceling function and a D/A conversion apparatus capable of canceling an input/output offset with high accuracy using this comparator. To eliminate unbalance between...
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6911865 |
Method and system for producing a drive signal for a current steering amplifier
Provided is a method and system for producing a drive signal for a current steering amplifier. An exemplary method comprises receiving a supply voltage signal and a differential input signal as a...
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6909327 |
Amplifier
An amplifier has a p-type and an n-type difference transistor pairs providing respective outputs, and is adapted to provide the outputs of the pairs in an integrated form. When the level of the...
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6906586 |
Differential amplifier circuit used in solid-state image pickup apparatus, and arrangement that avoids influence of variations of integrated circuits in manufacture and the like
The output terminal of a first voltage-current conversion circuit, which includes operational amplifiers and a resistor, is connected to the output terminal of a second voltage-current conversion...
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6906587 |
Current controlled bridge amplifier
An amplifier circuit. In one embodiment, the amplifier includes a first pair of transistors and a second pair of transistors. Each transistor in the amplifier includes a control terminal (e.g. a...
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6903607 |
Operational amplifier
An operational amplifier has a differential amplifier stage comprising a pair of first PMOS transistors for inputting signals, which are arranged between a positive voltage supply coupled with a...
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6897727 |
Current mode switch capacitor circuit
A device is provided having at least two capacitive elements configured to retain a charge, and an interconnection of active devices between the capacitive elements. The active devices are...
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6897726 |
Differential circuit, amplifier circuit, and display device using the amplifier circuit
A differential circuit comprises first and second differential pairs driven by constant-current sources, respectively, for receiving input voltages, first transistors, second transistors, and...
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6891433 |
Low voltage high gain amplifier circuits
In one embodiment, the present invention provides an amplifier circuit including a cascode input stage coupled to a differential stage. In another embodiment, an amplifier includes a differential...
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6891434 |
System and method for a startup circuit for a differential CMOS amplifier
A system is provided for correcting start-up deficiencies in an amplifier. The system includes a comparing device configured to (i) receive a second circuit node voltage and a reference voltage as...
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6888417 |
Voltage controlled oscillator
A folded starved inverter differential output apparatus for use in a voltage controlled oscillator includes a first polarity of two transistors that are cross-coupled and a second polarity of four...
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6885244 |
Operational amplifier with fast rise time
An operational amplifier comprising an inverting stage transistor that drives current to an output of the operational amplifier through a current path, and an auxiliary transistor that adds...
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6882224 |
Self-biasing for common gate amplifier
A data receiver having a transfer function that exhibits peaking at high frequencies is provided to compensate an input signal provided on a transmission channel having a low pass transfer...
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6873209 |
Input buffer circuit having function of canceling offset voltage
An input buffer circuit without a drop of a capability of a circuit and a limitation of a connection type with a circuit of a former stage is obtained. The output signal (OUTB) is inputted to a...
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6873206 |
Charge amplifier device having fully integrated DC stabilization
A fully integrated charge amplifier with DC stabilization includes a first amplifier having an input terminal and an output terminal, a first capacitor coupled between the input terminal and the...
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6870423 |
Output circuit capable of transmitting signal with optimal amplitude and optimal common-mode voltage at receiver circuit
An output circuit has a data control circuit, a variable resistance circuit, a common-mode voltage detection circuit, an adjusting circuit. The data control circuit controls data included in an...
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6870424 |
Low voltage differential in differential out receiver
A folded common cascode circuit with symmetric parallel signal paths from the differential inputs to a single ended output provides a low skew, low jitter, low power, high speed differential in/out...
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6870422 |
Low voltage rail-to-rail CMOS input stage
The present invention discloses a low voltage rail-to-rail CMOS input stage. The input stage includes a differential pail of P-channel metal oxide semiconductor field effect (PMOS) transistors,...
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6870696 |
CMOS low-noise MR read head pre-amplifier circuit
A preamplifier system is provided for use with a magneto-resistive (MR) sensor. Included is an alternating current (AC) coupling module connected to the MR sensor for blocking a direct current (DC)...
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6864723 |
High-swing transconductance amplifier
A charge pump circuit includes a high-swing transconductance amplifier. A high input swing transconductance is provided in a negative feedback loop of the charge pump circuit without an abrupt...
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6859095 |
Non-switched capacitor offset voltage compensation in operational amplifiers
A method for reducing offset voltage in an operational amplifier without the need for switched-capacitors, includes introducing a tapped resistor chain between the common connected terminals of the...
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6856198 |
Amplifier and method for voltage-to-current conversion
An amplifier includes a differential unit including an input port to receive a voltage input signal, a current mirror unit including an output port, and a voltage-to-current conversion unit to...
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