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| Number | Title | Issue Date |
| 7436251 | System and method for dynamic power-optimization of analog active filters A circuit including two operational amplifiers connected in parallel. For the purpose of this explanation, assume that an equivalent input noise of a circuit with one operational amplifier is too high. Where two operational amplifiers, are connected in parallel, the... | 10/14/2008 |
| 7414441 | Output buffer circuit An output buffer circuit includes an input stage of which one end receives an input voltage and the other end receives an output voltage; a class AB output stage that increases a current flowing in the output stage when the difference between the input and output vo... | 08/19/2008 |
| 7394310 | System and method for programmable switching characteristics of an analog switch in a transconductance amplifier Provided are a method and system for controlling impedance in a transconductance amplifier. A system includes a first transconductance amplifier and a second transconductance amplifier configured to control electrical characteristics associated with the first transc... | 07/01/2008 |
| 7368980 | Producing reference voltages using transistors An exemplary circuit embodiment includes a depletion-mode transistor and an enhancement-mode transistor. The circuit also includes a circuit portion coupled to a gate region of the depletion-mode transistor and to a gate region of the enhancement-mode transistor. In... | 05/06/2008 |
| 7348911 | Common mode management between a current-steering DAC and transconductance filter in a transmission system Common mode management between a DAC, such as a current-steering DAC, and a transconductance filter in a high-frequency transmission system. In one aspect of the invention, a transmission circuit includes a DAC that provides an analog signal from an input digital si... | 03/25/2008 |
| 7342450 | Slew rate enhancement circuitry for folded cascode amplifier A folded-cascode operational amplifier including a differential input stage (19) and a class AB output stage (20) includes a first slew boost current mirror (13) and a second slew boost current mirror (14) having inputs connected to drain... | 03/11/2008 |
| 7339433 | Differential amplifier stage A differential amplifier stage includes one active load circuit connected to a pair of cross-coupled transistors that produce a differential signal. The active load circuit controls the rise time of the differential signal. The differential amplifier stage also incl... | 03/04/2008 |
| 7339431 | CMOS amplifiers with frequency compensating capacitors The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the diffe... | 03/04/2008 |
| 7321246 | Driver circuit for a liquid crystal display A driver circuit includes a differential amplifier for receiving an input signal, and first and second transistors of different conductivity types. The first and second transistors are connected serially between two power supply terminals in a form (source follower)... | 01/22/2008 |
| 7279954 | On-chip temperature detection device An on-chip temperature detection device includes: a bipolar type power transistor; a mirror transistor in which a collector current, which is proportional to a collector current of the power transistor, flows; a current detection section that detects the collector c... | 10/09/2007 |
| 7274223 | Semiconductor device As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance. A semiconductor device having a semiconductor switching element and a drive controlling means (1) for gener... | 09/25/2007 |
| 7271660 | Selectively adding auxiliary frequency compensation depending on the behaviour of an output transistor of a rail-to-rail operational amplifier A frequency compensation device for providing added compensation to an operational amplifier, such as a bipolar or MOS rail-to-rail output operational amplifier, when the output device of the operational amplifier is in saturation. The device comprises a detector ci... | 09/18/2007 |
| 7239195 | Active power supply rejection using negative current generation loop feedback A negative current generator for an amplifier circuit including a shunt transistor, first and second mirror transistors, a current bias device, and an amplifier. The amplifier circuit includes a current source transistor having current terminals coupled between a su... | 07/03/2007 |
| 7224193 | Current-voltage conversion circuit A CV conversion circuit capable of measuring a plurality of capacitances with a simple circuit is provided. A time-division signal is applied to each capacitor, whereby a plurality of capacitances of the capacitors can be measured in series by a circuit with a small... | 05/29/2007 |
| 7205816 | Variable-gain-amplifier based limiter to remove amplitude modulation from a VCO output An apparatus and method for generating high-speed clock signals using a voltage-controlled-oscillator (VCO) device. The apparatus implements a linear variable gain amplifier rather than a non-linear hard limiter to remove unwanted signal modulation in VCO output sig... | 04/17/2007 |
| 7202711 | Technique for determining a load current An integrated driver with improved load current sense capability includes a first transistor, a first amplifier, a second transistor, a third transistor, a second amplifier and a fourth transistor. The integrated driver allows for significantly better fault handling... | 04/10/2007 |
| 7186595 | Solid picture element manufacturing method A solid picture element that transfers charges completely from a photodiode portion to an amplifying transistor portion to substantially eliminate residual images and methods of its manufacture are disclosed. The solid picture element includes a buried photodiode an... | 03/06/2007 |
| 7176755 | Transistor-based interface circuitry Among the embodiments of the present invention is an apparatus that includes a transistor, a servo device, and a current source. The servo device is operable to provide a common base mode of operation of the transistor by maintaining an approximately constant voltag... | 02/13/2007 |
| 7173869 | Regulating voltages in semiconductor devices The present invention provides a method and apparatus for regulating voltages in semiconductor devices. The method and apparatus includes providing a first voltage level using a voltage regulator, determining that a second voltage level is desired and initializing t... | 02/06/2007 |
| 7157959 | Method of forming a self-gated transistor and structure therefor In one embodiment, a self-gated transistor includes a sensing portion that generates a sense signal that is used to drive the self-gated transistor. ... | 01/02/2007 |
| 7157973 | Layout technique for matched resistors on an integrated circuit substrate Provided a method of reducing impedance variations in an electrical circuit structured and arranged for placement on an integrated circuit (IC) substrate. The method includes forming sets of parallel connected resistors, each set corresponding to one of the impedanc... | 01/02/2007 |
| 7158359 | Circuit configuration having a semiconductor switch and a protection circuit A circuit configuration has a first semiconductor switch and a first protection circuit. The protection circuit has a second semiconductor switch whose load path is connected between a control terminal and a load path terminal of the first semiconductor switch. The ... | 01/02/2007 |
| 7148745 | Sleep mode recovery One embodiment in accordance with the invention is a circuit. For example, the circuit can include a first stage amplifier coupled to receive a reference voltage. The circuit can also include a second stage amplifier coupled with an output of the circuit and the fir... | 12/12/2006 |
| 7138858 | Apparatus and methods for output buffer circuitry with constant output power in radio-frequency circuitry A buffer circuitry buffers a radio-frequency (RF) signal. The buffer circuitry includes a complementary pair of switches and a power source. The a complementary pair of switches has an input terminal and output terminal. The input terminal of the complementary pair ... | 11/21/2006 |
| 7129773 | Band-gap type constant voltage generating circuit A band-gap type constant voltage generating circuit is produced in a semiconductor chip, and has a first potential terminal and a second potential terminal. A band-gap circuit includes first and second transistors having respective bases connected to each other, a f... | 10/31/2006 |
| 7122882 | Low cost power MOSFET with current monitoring A semiconductor integrated circuit package having a common source current sensing circuit includes a main die having an integrated circuit, the main die including a source bonding pad and a gate bonding pad disposed on an upper surface, a leadframe having a leadfram... | 10/17/2006 |
| 7098718 | Tunable current-mode integrator for low-frequency filters A tunable current mode integrator for low-frequency continuous-time filters that requires a reduced amount of area when implemented in an integrated circuit (IC). The integrator includes input and output transistors, and cross-coupled current mirrors, integration ca... | 08/29/2006 |
| 7098652 | Analytical circuit for an inductive sensor An analytical circuit for an inductive electromagnetic sensor with external excitation (1) generates an output signal which is transformed to give an output signal (out), by means of transformation to a reference voltage (Vref) in an inverting low-pass filter... | 08/29/2006 |
| 7095256 | Low-power wide dynamic range envelope detector system and method An envelope detector system is disclosed for detecting an envelope in a system input signal. The envelope detector system includes an input node for receiving an input voltage signal, a transconducting amplifier for receiving the input voltage signal and producing a... | 08/22/2006 |
| 7068092 | Common voltage source integrated circuit for liquid crystal display device A common voltage source IC device includes an operational amplifier, a push-pull circuit receiving an output signal from the operational amplifier and outputting a common voltage to a common voltage terminal; an inverting resistor connected to an inverting input of ... | 06/27/2006 |
| 7064558 | Millivolt output circuit for use with programmable sensor compensation integrated circuits An output sensor apparatus, system, and method including a circuit having a plurality of bridge resistors and one or more connecting resistors coupled to the plurality of bridge resistors. Additionally, a programmable amplifier can be coupled to the connecting resis... | 06/20/2006 |
| 7053671 | Low-jitter differential-to-single-ended data conversion circuits Circuitry is provided for converting differential digital data to single-ended digital data. Differential data signals have complementary pairs of signals that are referenced to each other. Single-ended signals are referenced to ground. The circuitry can be used on ... | 05/30/2006 |
| 7053591 | Power conversion device with efficient output current sensing A power conversion device contains an electronic circuit for sensing an output current characteristic of an output drive device. The characteristic of the current through the output drive device is sensed and communicated to a switching device for controlling a sens... | 05/30/2006 |
| 7053695 | Current source circuit and amplifier using the same There is provided a current source circuit in which a outflow current of an output terminal is equal to an inflow current thereof. The current source circuit includes a first transistor group converting a reference current from a reference current source into a volt... | 05/30/2006 |
| 7053698 | Methods for extracting the mean (common mode) voltage of two input signals Methods and circuits for extracting a true mean of two signals are provided. A first amplifier input stage (e.g., an n-type stage) is operated when a mean of the two signals approaches an upper rail voltage. A second amplifier input stage (e.g., a p-type stage) is o... | 05/30/2006 |
| 7049856 | High speed peak amplitude comparator Various methods and circuits for implementing high speed peak amplitude comparison. The invention achieves higher speed of operation by eliminating the slow feedback loop commonly employed in peak detection. In one embodiment, the invention directly compares a signa... | 05/23/2006 |
| 7046077 | Current source circuit and amplifier using the same There is provided a current source circuit in which a outflow current of an output terminal is equal to an inflow current thereof. The current source circuit includes a first transistor group converting a reference current from a reference current source into a volt... | 05/16/2006 |
| 7030688 | Low-pass filter for a PLL, phase-locked loop and semiconductor integrated circuit The invention provides a low-pass filter suitably used as a loop filter for a PLL or a DLL that has a filtering characteristic equivalent to that of a conventional one and can be realized in a smaller circuit area. The low-pass filter includes first filtering means ... | 04/18/2006 |
| 7019579 | Circuit arrangement for rapidly controlling in particular inductive loads A circuit arrangement for rapidly switching in particular inductive loads, comprises a load (11) being connectable to a supply voltage source (31) by means of a switching transistor(41) implemented as an N-channel MOS power transistor and connec... | 03/28/2006 |
| 6943611 | Drive control circuit for a junction field-effect transistor A drive control circuit for a junction field-effect transistor having a gate terminal, a drain terminal and a source terminal as well as a gate leakage current and a maximally permissible gate current, includes a current supply which feeds the gate and produces a co... | 09/13/2005 |
