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| Number | Title | Issue Date |
| 7327164 | Interface circuit An interface circuit includes a first and a second input terminal, a first output transistor, a second output transistor, a first output controller for implementing control according to a voltage supplied to the first and the second input terminal so that a predeter... | 02/05/2008 |
| 7327186 | Fast wide output range CMOS voltage reference A circuit is disclosed that compensates for changes in temperature as well as for fluctuations in a supply voltage (Vcc) so that voltage reference values generated thereby are maintained at substantially constant levels irrespective of changes in temperature or fluc... | 02/05/2008 |
| 7323934 | Operational transconductance amplifier An operational transconductance amplifier (OTA) includes a first, a second and a third differential units, a voltage-to-current converting unit and a current subtraction device. The first and the second differential units receive a differential input voltage and the... | 01/29/2008 |
| 7319620 | Input and output buffers having symmetrical operating characteristics and immunity from voltage variations A pair of self-biased differential amplifiers having a non-symmetrical topology are combined to provide a self-biased differential amplifier having a symmetrical topology. Each of the combined differential amplifiers includes a pair of transistors coupled to each ot... | 01/15/2008 |
| 7317307 | Circuit arrangement for load regulation in the receive path of a transponder A circuit arrangement for load regulation of circuit components is arranged in a receive path of a transponder, having an input path through which a first voltage signal can be tapped, having a voltage sensor arranged in the input path for measuring the first voltag... | 01/08/2008 |
| 7312651 | Cascode current mirror circuit operable at high speed A current mirror circuit includes a first transistor having a source node connected to a reference potential, a second transistor having a source node coupled to a drain node of the first transistor and a gate node connected to a first predetermined potential, an in... | 12/25/2007 |
| 7310015 | Temperature-compensated circuit for power amplifier using diode voltage control Provided is a temperature-compensated circuit for a power amplifier through diode voltage control, in which a first resistor (Rref), a first diode (D1), and a second diode (D2) are connected to a reference voltage in series. The temperature-compensated... | 12/18/2007 |
| 7309978 | Reference voltage generating circuit with ultra-low power consumption A reference voltage generating circuit with ultra-low power consumption, which includes: a constant current circuit part generating a first constant current from a supply voltage; a current mirror circuit part mirroring the constant current and supplying a second co... | 12/18/2007 |
| 7310019 | High frequency power amplifier A high frequency power amplifier includes: a multi-finger transistor including transistor cells electrically connected in parallel; an input side matching circuit connected to gate electrodes of the transistor cells; and resonant circuits, each resonant circuit bein... | 12/18/2007 |
| 7304540 | Source follower and current feedback circuit thereof A current feedback circuit is used in the source follower. The source follower includes a first MOS transistor and a current mirror. The first MOS transistor has a gate receiving an inputting signal and a source outputting an output signal. A drain current flows thr... | 12/04/2007 |
| 7304539 | High frequency power amplifier circuit and electronic component for high frequency power amplifier In a high frequency power amplifier circuit that supplies a bias to an amplifying FET by a current mirror method, scattering of a threshold voltage Vth due to the scattering of the channel impurity concentration of the FET, and a shift of a bias point caused by the ... | 12/04/2007 |
| 7288947 | Method for simulating resistor characteristics at high electric fields A method for characterizing the current as a function of applied electric field for a resistor exposed to a high electric fields is described. The method uses current versus voltage measurements at low electric fields, where the resistor is not damaged and the curre... | 10/30/2007 |
| 7289775 | Method for transmit power control A transceiver has power control circuitry integrated therein. In particular, the power control circuitry receives a signal indicative of the transmit power level and adjusts the gain on a variable gain amplifier within the transceiver such that the output of the tra... | 10/30/2007 |
| 7279873 | Current-limited protection circuit of switching power converter A switching power converter comprises a switch, a pulse width modulation (PWM) circuit, a rectifying filter circuit and a current limited protection circuit. The input terminal of the rectifying filter circuit is coupled to an input voltage via the switch. The curre... | 10/09/2007 |
| 7279981 | Compensation method for low voltage, low power unity gain amplifier A unity gain amplifier has a current mirror. A compensation circuit has an input coupled to an output of the current mirror. An output transistor has a base coupled to the output of the current mirror and a source of the output transistor is coupled to an output of ... | 10/09/2007 |
| 7274748 | AM to FM correction system for a polar modulator A transmitter for a mobile terminal including a polar modulator that compensates for amplitude to frequency distortion (AM to FM distortion) of a power amplifier in the transmit chain is provided. In general, the modulator includes a polar converter that converts an... | 09/25/2007 |
| 7274252 | Power amplification circuit and operational amplifier incorporating said circuit A power amplifier circuit comprising first and second modules, a current source and a push-pull module. The push-pull module comprises two intermediate transistors and two output transistors. The circuit also comprises third and fourth modules, operating in current ... | 09/25/2007 |
| 7271645 | Smart charge-pump circuit for phase-locked loops The smart charge-pump circuits basically include a high-performance charge-pump circuit as well as a smart lock-in circuit. After the smart charge-pump circuit sensors an initial condition and responds accordingly, it will begin to operate fully as a high performanc... | 09/18/2007 |
| 7265628 | Margin tracking cascode current mirror system and method A margin tracking cascode current mirror system including a current mirror circuit having a current source device having a predetermined operating voltage for providing a current to a load, a cascode circuit interconnected between the current mirror and the load for... | 09/04/2007 |
| 7262650 | Amplitude adjusting circuit An amplitude adjusting circuit comprises a first current mirror where a variable current of a variable current source is copied into each of 1st-3rd transistors; a second current mirror where the variable current is copied into each of 11th-13th transistors; a third... | 08/28/2007 |
| 7262666 | Amplifier circuit having an extended Wilson current-mirror self-bias boosting circuit An amplifier circuit (1) includes an amplifying transistor (QØ) and a dc bias circuit (2) for biasing the amplifier transistor (QØ) to obtain a conduction angle of at least about 180°. The dc bias circuit (2) includes a self-bias boosting cir... | 08/28/2007 |
| 7256646 | Neutralization techniques for differential low noise amplifiers An differential LNA has first and second input MOS transistors, with differential inputs applied to their respective control gates and differential outputs taken at their respective drains. The gate-to-drain, Cgd, feedback capacitances of the first and second input ... | 08/14/2007 |
| 7253678 | Accurate cascode bias networks Bias networks are provided for accurate generation of biases of cascode transistor arrangements. Network embodiments generate a voltage that accurately biases the transistor of a cascode arrangement at a selected point in its saturation region and this voltage is ac... | 08/07/2007 |
| 7250791 | Current feedback amplifiers Current feedback amplifiers circuits that generate common mode (CM) and/or differential mode (DM) currents are provided herein. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objec... | 07/31/2007 |
| 7245189 | High linearity digital variable gain amplifier Variable gain amplifiers offering high frequency response with improved linearity and reduced power dissipation are provided. An amplifier is disclosed that is constructed from a one-stage topology with multiple signal paths and compensation networks for improved li... | 07/17/2007 |
| 7245184 | High frequency power amplifier circuit, high frequency power amplifier electronic component and method thereof A high frequency power amplifier electronic component (RF power module) is so constituted as to apply bias to an amplifier FET in current mirror configuration. In this RF power module, deviation of a bias point due to the short channel effect of the FET is corrected... | 07/17/2007 |
| 7245162 | Apparatus and method for headroom compensation using dynamic transconductance enhancement An output stage circuit may include a sourcing driver device, a nonlinear local feedback loop having a feedback transistor and a first current mirror, a sinking driver device, and an output signal. The output stage circuit may actively and dynamically adjust the tra... | 07/17/2007 |
| 7245182 | High frequency amplifier circuit A high frequency amplifier circuit has a bias supplying transistor for supplying a bias current to an amplifying transistor, and first and second temperature compensating transistors for compensating the temperature properties of the base voltage of the bias supplyi... | 07/17/2007 |
| 7242252 | Transistor bias current regulation apparatus, method, and system A biased transistor circuit utilizes a transistor that exhibits a change in threshold voltage as the drain-to-source voltage changes due to power supply voltage changes. A bias circuit senses the power supply voltage changes and modifies a gate bias voltage on the t... | 07/10/2007 |
| 7239204 | Current shunt instrumentation amplifier with extended bipolar input common mode range An amplifier circuit includes first (7A) and second (7B) operational amplifiers connected in a parallel configuration. A first terminal (12) of a first input resistor (5) is coupled to one input of both of the first (7A) and second... | 07/03/2007 |
| 7236111 | Linearizing methods and structures for amplifiers Methods and structures are provided to enhance the linearity of amplifiers such as those which include a complementary common-collector amplifier stage. The methods and structures configure this stage so that each transistor of the stage drives an output port throug... | 06/26/2007 |
| 7233171 | Apparatus and method for transconductance stage with high current response to large signals A transconductance stage is provided. The transconductance stage includes a tail current source, a differential pair, and two current mirrors. The input to each of the current mirrors is connected to the drain of a separate one of the transistors in the differential... | 06/19/2007 |
| 7230491 | Method and apparatus for an LNA with high linearity and improved gain control A bias circuit for biasing a linear input stage of an amplifier comprises a first MOS device having a size. A second MOS device has a size and is arranged with the first MOS device in a cascode configuration. The second MOS device is operated in a saturation region.... | 06/12/2007 |
| 7227416 | Current mirror with low static current and transconductance amplifier thereof A current mirror with a transconductance amplifier containing the current mirror with a low static current. The current mirror includes: a load with first end and a second end, the first end coupling to a first input current and a fixed voltage difference existing b... | 06/05/2007 |
| 7224230 | Bias circuit with mode control and compensation for voltage and temperature An amplifier bias system. The amplifier bias system includes a battery voltage supply coupled with an amplifier transistor to be biased; an output node coupled with a gate of the amplifier transistor; and a current source coupled with the battery voltage supply, whe... | 05/29/2007 |
| 7224010 | Voltage-controlled amplifier for a signal processing system A voltage-controlled amplifier for a signal processing system includes an input voltage reception end, a first voltage-to-current converter, a reference current generator, a gain adjustment circuit, a first current mirror, and an output circuit. The voltage-controll... | 05/29/2007 |
| 7215187 | Symmetrically matched voltage mirror and applications therefor A voltage mirror circuit using a symmetrically matched transistor structure is provided. The circuit includes an input reference voltage node on a first side of said circuit and an output mirror voltage node on a second side of said circuit, and a plurality of match... | 05/08/2007 |
| 7212627 | Line interface with analog echo cancellation A line interface performs echo cancellation without the use of a hybrid filter network and includes a transmit path having a line driver, a single matching network terminating the line, and a single transformer. The transformer uses split windings on both the primar... | 05/01/2007 |
| 7208998 | Bias circuit for high-swing cascode current mirrors A bias circuit for providing at least first and second bias signals for biasing a cascode current source and/or a cascode current sink includes a resistive element and first, second and third transistors, each transistor having first and second source/drain terminal... | 04/24/2007 |
| 7202744 | Transresistance amplifier A transresistance amplifier circuit includes an input terminal receiving an input current, an output terminal providing an output voltage indicative of the input current, a first bias current source providing a first bias current to the input terminal, a first trans... | 04/10/2007 |
