Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8138831 | Low noise amplifier A method for low noise signal amplification includes modifying a signal by way of a first amplification stage and conveying the modified signal to a second amplification stage. The method continues with comparing an output of the second amplification stage with a si... | 03/20/2012 |
| 7961044 | Amplifier An amplifier includes: a variable gain unit that adjusts an amplitude of an input signal and outputs a first signal; an amplitude limiting unit that limits an amplitude of the first signal and outputs a second signal set to have an amplitude of a first amplitude val... | 06/14/2011 |
| 7898326 | Device and method for amplifying radiocommunication signals A method for amplifying radiocommunication signals via a string of amplifiers associated with a gain controller receiving an amplification setpoint of constant value, in order to produce an amplification of constant gain or of variable value, in order to produce an ... | 03/01/2011 |
| 7733176 | System and method for power amplifier output power control A system for controlling amplifier power is provided. The system includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signa... | 06/08/2010 |
| 7728664 | Low noise amplifier with multiple inputs and multiple outputs Satellite set-top boxes (STB) are increasingly being designed with multiple tuners, making them capable of receiving more than one program at a time. In addition, satellite STBs are increasingly being designed with multiple inputs, to permit reception of additional ... | 06/01/2010 |
| 7551027 | RF power amplifier mirror circuit for sensing current An apparatus and method is disclosed for providing a mirror circuit for detecting a change in current of a RF power amplifier. The mirror circuit includes a voltage operably coupled with the mirror circuit, a bias circuit operably coupled with the mirror circuit, wh... | 06/23/2009 |
| 7486137 | System and method for power amplifier output power control An architecture for detecting amplifier power is provided. The architecture includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current env... | 02/03/2009 |
| 7471147 | Automatic gain controller An automatic gain controller includes a variable gain amplifier for amplifying an input signal having a specified DC level on the basis of the DC level, and outputting a first differential signal having a specified gain α, a second differential signal having a 180Â... | 12/30/2008 |
| 7466196 | Detector for automatic gain control Provided is a detector for automatic gain control (AGC). The detector for AGC is used for a variable gain amplifier (VGA) including at least one VGA cell. The detector for AGC includes: first and second transistors having drains connected in common to a power supply... | 12/16/2008 |
| 7414486 | Device and method for power calibration of an oscillator It is therefore the object of the present invention to disclose a device for power calibration of an oscillator in the high-frequency range, which has a reduced number of components and/or has less-expensive components. A method for power calibration of an oscillato... | 08/19/2008 |
| 7375584 | Gain adjustment method, gain adjustment circuit, and optical disc device having same gain adjustment circuit A gain adjustment circuit includes a gain varying device for varying the gain of an input signal; and a detection device for detecting a variable output signal of the gain varying device, wherein the detection output signal of the detection device is fed back to the... | 05/20/2008 |
| 7366482 | Transmission device, transmission output control method, and radio communications device Either linear operating mode or saturation operating mode is set as the operating mode of a high-frequency power amplifier on the basis of an operating mode set signal. The gain of a variable gain amplifier provided in front of the high-frequency power amplifier and... | 04/29/2008 |
| 7358807 | Protection of output stage transistor of an RF power amplifier A protection method may prevent a load-mismatch-induced failure in solid-state power amplifiers. In an RF power amplifier, the load voltage standing-wave ratio results in very high voltage peaks at the collector of the final stage and may eventually lead to permanen... | 04/15/2008 |
| 7345538 | Measuring circuit for the output of a power amplifier and a power amplifier comprising the measuring circuit A measuring circuit for the output of a power amplifier and a power amplifier comprising the measuring circuit comprises a first transistor (4f). The output current (27) of the first transistor (4f) is characteristic of the output ... | 03/18/2008 |
| 7292169 | 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 level of the analog signal from the frequency converter; an A/D convertin... | 11/06/2007 |
| 7292093 | Envelope detector with DC level shifting An envelope detector that does not generate an undesirable DC offset at its DC output signal. An envelope detector according to the present teachings includes a circuit for performing a DC level shift on an AC input signal applied to the envelope detector such that ... | 11/06/2007 |
| 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 |
| 7253681 | Power amplifier with integrated sensors An amplifier circuit for amplifying radio frequency signals includes a radio frequency power amplifier to receive an input radio frequency signal and to output an amplified radio frequency signal; one or more sensors coupled to the radio frequency power amplifier to... | 08/07/2007 |
| 7250818 | RF power amplifier circuit and RF transmitter and terminal including it A RFPA (radio frequency power amplifier) circuit (150) which includes a RFPA (101), a supply voltage source (104), means (155) for applying to the RFPA a gain control bias voltage and a feedback control loop (156) for adjusting a v... | 07/31/2007 |
| 7242246 | Amplitude detecting method, AGC circuit gain controlling method, amplitude detecting apparatus and AGC amplifier circuit In an amplitude detecting circuit, a phase shifter, into which an alternating current signal that is outputted from an AGC circuit is inputted, outputs first and second alternating current signals between which there is a phase difference. In addition, full wave rec... | 07/10/2007 |
| 7190221 | Method and apparatus for maintaining constant linearity for a power amplifier over varying load conditions A circuit and method for applying a dynamically varying collector voltage to a power amplifier is presented. A desired output power is determined, and an input and output power of a power amplifier are measured. A processor determines, for the measured input power a... | 03/13/2007 |
| 7183846 | Device for detecting the power of a signal and integrated circuit with amplifier and related power detection device The present invention describes a device for detecting the power of a first signal at a given frequency. The device comprises a first circuit means for detecting the envelope of the first signal and a second circuit means coupled to the first circuit means and suita... | 02/27/2007 |
| 7171171 | GaAs RF signal detection circuit with operational amplifier A mobile terminal senses transmitted power in a Gallium Arsenide (GaAs) circuit. The GaAs circuit provides a steady reference voltage through the use of an operational amplifier and feedback circuit. The operational amplifier drives the bases of two transistors to c... | 01/30/2007 |
| 7167693 | Scanning receiver for use in power amplifier linearization A feed forward power amplifier system and method identify active channels across a frequency band to suppress unwanted intermodulation distortion (IMD) products in a communications signal such as a single- or multi-carrier communications signal. A scanning receiver ... | 01/23/2007 |
| 7164315 | Power detector for mismatched load A method for measuring the forward power output of an amplifier with improved accuracy with a mismatched load based on probing the amplitude of the AC voltage and current in the final amplifier stage. Amplitudes are combined resulting in a composite reading that is ... | 01/16/2007 |
| 7143015 | Method and system for rapid identification of multiple input systems The disclosure describes techniques for determining the response characteristics of a system. One such technique includes applying a series of M vector probe input signal sets of a form {overscore (V)}m x(t) to the system, wherein {overscore (V)}m | 11/28/2006 |
| 7078966 | Power amplifier saturation detection and operation at maximum power Power amplifier apparatus comprising a power amplifier (1) having a signal output, and a power control feedback loop (3, 4, 5) for controlling the output signal power relative to a first power target signal (8). A saturation control loop (6, ... | 07/18/2006 |
| 7061316 | High frequency power detector with dBm-linear characteristic and method of regulating the power of an electrical HF-oscillation A high frequency power detector includes an input coupling arrangement that couples an electrical HF-oscillation into a basic circuit portion including at least a first diode and a circuit node. The power detector further includes a series circuit of a resistor and ... | 06/13/2006 |
| 7046092 | Amplifier circuit having signal detection function In an amplifier circuit, a main amplification section includes an amplifier for amplifying an input signal and a reference voltage generation circuit for generating a reference voltage from an output signal of the amplifier. Other main amplification sections each in... | 05/16/2006 |
| 7042285 | RF power amplifier with load insensitive indirect forward power detector A power amplifier circuit includes an adjustable gain power amplifier for amplifying an RF input signal. An isolated node in the adjustable gain power amplifier is isolated from the output load by a gain stage of the adjustable gain power amplifier. The power level ... | 05/09/2006 |
| 7038543 | Collective automatic gain control A data receiver includes group envelope detection circuitry that produces a group envelope voltage. The group envelope voltage represents the average envelope of a plurality of amplified data signals. Associated feedback adjusts the gains applied to each data signal... | 05/02/2006 |
| 7030689 | Isolated DC-to-DC converter An isolated direct-current to direct-current (DC-to-DC) converter and associated method are provided which employ a class-D amplifier. An alternating current (AC) input voltage and a DC input voltage drive the class-D amplifier to produce an AC primary voltage. The ... | 04/18/2006 |
| 7030692 | Circuit and method for controlling gain in an amplifier A circuit is provided for controlling the gain of an amplifier, such as an amplifier that may be used in telecommunication devices. The circuit includes an analog portion that receives signals from one or more mixers and that produces an output that is an inverse lo... | 04/18/2006 |
| 7010284 | Wireless communications device including power detector circuit coupled to sample signal at interior node of amplifier A multi-stage amplifier is coupled with a power detector. The multi-stage amplifier includes a plurality of amplifier stages in series, with a signal path extending through them. The power detector is coupled to an interior node of the amplifier along the signal pat... | 03/07/2006 |
| 6989712 | Accurate power detection for a multi-stage amplifier A multi-stage amplifier is coupled with a power detector. The multi-stage amplifier includes a plurality of amplifier stages in series, with a signal path extending through them. The power detector is coupled to an interior node of the amplifier along the signal pat... | 01/24/2006 |
| 6982594 | System for developing a secondary control signal in a power amplifier control loop A power control loop for a power amplifier is disclosed. Embodiments of the power control loop include deriving a secondary control signal. The secondary control signal may be used to control a gain applied to the power signal in the power control loop and to contro... | 01/03/2006 |
| 6954104 | Method and system for monitoring a deliverable radio frequency power of an amplifier operable on a monolithic microwave integrated circuit A method and system are described for monitoring a deliverable radio frequency (RF) power of an amplifier operable on a monolithic microwave integrated circuit (MMIC). According to an exemplary embodiment, circuitry is configured to capture, on the MMIC, a first por... | 10/11/2005 |
| 6952132 | Method and apparatus for automatic gain control Systems and methods provide automatic gain control, such as by employing analog and digital techniques. For example, overall gain may be controlled through coarse and fine control signals provided to gain stages, with the overall gain monitored via a power detector ... | 10/04/2005 |
| 6946924 | Low noise voltage controlled oscillator A voltage controlled oscillator, comprising a pair of transistors connected to a tank circuit, said tank circuit including a plurality of tuning diodes connected in parallel with an inductor, said tuning diodes having cathodes connected to a common connection. ... | 09/20/2005 |
| 6924698 | Power detector for mismatched load A method for measuring the forward power output of an amplifier with improved accuracy with a mismatched load based on probing the amplitude of the AC voltage and current in the final amplifier stage. Amplitudes are combined resulting in a composite reading that is ... | 08/02/2005 |
