| Patent Number |
Title Of Patent |
Date Issued |
| 7616931 |
System and method for reducing phase distortion in a linear transmitter |
November 10, 2009 |
| The invention decreases phase distortion in a transmitter by balancing C load in the power amplifier input such that a PGA won't have phase distortion. |
| 7616055 |
Transmitter apparatus with extended gain control |
November 10, 2009 |
| A transmitter includes a first variable gain amplifier (VGA) and a second VGA coupled to an output of the first VGA. The first and second VGAs each comprise a plurality of parallel gain stages. Gains of the first and second VGAs are equal to the sum of the gains of the activated parallel |
| 7606550 |
Method and system for a dual mode receiver with low intermediate frequency (IF) and zero second |
October 20, 2009 |
| In RF transceivers, a method and system for a dual mode receiver with low intermediate frequency (IF) and zero second IF are provided. An RF receivers may be adapted to operate in a low IF down conversion mode or a baseband down conversion mode. A control signal may be generated based on |
| 7606321 |
System and method for simplifying analog processing in a transmitter incorporating a randomizati |
October 20, 2009 |
| The system and method enable simpler analog processing in a transmitter by reducing the number of bits in a digital signal through delta sigma modulation. Selection of current sources in a digital to analog converter of the transmitter is done using a randomization circuit. |
| 7603085 |
Bandpass filter with integrated variable gain function |
October 13, 2009 |
| The invention enables a gain adjustment in a receiver to improve signal quality. |
| 7596195 |
Bandpass filter with reversible IQ polarity to enable a high side or low side injection receiver |
September 29, 2009 |
| The invention enables a reversing IQ polarity in a bandpass filter so that the bandpass filter can filter signals with high side or low side injection. |
| 7583143 |
Method and system for digitally controlling transmitter gain compensation |
September 1, 2009 |
| Methods and systems for digitally controlling transmitter gain compensation are disclosed. Aspects of one method may include applying an effective negative resistance to differential outputs of amplifying circuitry to compensate for gain changes that may be due to temperature changes |
| 7554411 |
Wireless transmitter having multiple programmable gain amplifiers (PGAs) with tuned impedance to |
June 30, 2009 |
| A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second programmable gain amplifiers (PGAs). The first PGA is tuned to have a resonant frequency |
| 7551029 |
Transconductance stage providing gain control |
June 23, 2009 |
| A transconductance stage providing gain control includes an input stage to convert a first differential input voltage and a second differential input voltage to a first intermediate current and a second intermediate current, respectively. An output stage generates a first output current |
| 7548733 |
Wireless transmitter having multiple power amplifier drivers (PADs) that are selectively biased |
June 16, 2009 |
| A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second non-linear phase res |
| 7512378 |
Adaptive radio transceiver |
March 31, 2009 |
| An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration in |
| 7474880 |
Linear and non-linear dual mode transmitter |
January 6, 2009 |
| A transmitter includes a dual mode modulator and an amplifier coupled to the dual mode modulator. The dual mode modulator implements a linear modulation scheme during a first mode of the modulator to produce a variable envelope modulated signal. The dual mode modulator implements a n |
| 7440732 |
Apparatus and method of local oscillator leakage cancellation |
October 21, 2008 |
| A transmitter includes a first mixer to generate a first output signal by up-converting a first baseband signal having a first DC offset component. A second mixer generates a second output signal by up-converting a second baseband signal having a second DC offset component. The second ou |
| 7376409 |
Bandpass filter with integrated variable gain function using improved resistor array |
May 20, 2008 |
| The invention enables a gain adjustment in a receiver to improve signal quality by varying resistance of an input resistor array of a bandpass filter, the array having a plurality of resistors in series with switches that out of the path of the current when the resistors are in use. |
| 7336129 |
Analog amplitude detector |
February 26, 2008 |
| A circuit includes at least two transistors arranged to form a current mirror, at least two transistors operatively coupled to the current mirror, where the transistors are arranged to form a differential pair amplifier, and a follower transistor operatively coupled to the current mi |
| 7327198 |
Method and system for a polyphase clock for a second intermediate frequency (IF) mixer to improv |
February 5, 2008 |
| Methods and systems for reducing interference in a signal are disclosed herein. Aspects of the method may comprise generating a first local oscillator signal. The generated first local oscillator signal may be phase-shifted to generate a second local oscillator signal and the second |
| 7274253 |
Transmitter apparatus with extended gain control |
September 25, 2007 |
| A transmitter includes a first variable gain amplifier (VGA) and a second VGA coupled to an output of the first VGA. The first and second VGAs each comprise a plurality of parallel gain stages. Gains of the first and second VGAs are equal to the sum of the gains of the activated parallel |
| 7199659 |
Non-match power amplifier and method for increased output 1 dB compression point |
April 3, 2007 |
| The invention enables an increase in linear power output ranges in a power amplifier by using an unmatched power amplifier driver in place of a matched power amplifier driver. |
| 7183858 |
Wireless transmitter having multiple programmable gain amplifiers (PGAs) with tuned impedance to |
February 27, 2007 |
| A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second programmable gain amplifiers (PGAs). The first PGA is tuned to have a resonant frequency |
| 7145390 |
Differential power amplifier and method in class AB mode |
December 5, 2006 |
| The invention enables an increase in linearity of a power amplifier while reducing current consumption by supplying a bias current to the power amplifier in a Class AB mode. |
