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| Number | Title | Issue Date |
| 7558351 | Super harmonic filter and method of filtering frequency components from a signal A harmonic filter for filtering a plurality of frequency components from an input signal comprises a phase shifter for generating an in-phase signal and a quadrature-phase signal according to the input signal; and a plurality of polyphase filter networks coupled in ... | 07/07/2009 |
| 7336114 | High-speed latching technique and application to frequency dividers The inventive technique can dynamically adjust the current being applied within the components of a prescaler or divider. This dynamic scaling of the current can improve the speed of the divider by a factor of two or reduce the average current in half when compared ... | 02/26/2008 |
| 7266352 | Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillat... | 09/04/2007 |
| 7221218 | MOSFET amplifier having feedback controlled transconductance A signal is applied to the body of a MOSFET to enhance the transconductance of the MOSFET. The signal applied to the body of the MOSFET has essentially the same waveform as an input signal supplied to the gate of the MOSFET, and is shifted by approximately 180 degre... | 05/22/2007 |
| 7215266 | Hybrid DC offset cancellation scheme for wireless receiver Systems and methods for canceling static and dynamic DC offsets by combining a digital DC offset correction scheme with an analog DC offset correction scheme. A feedback-based digital DC offset correction scheme provides different adjustment levels for a plurality o... | 05/08/2007 |
| 7078986 | Symmetrical polyphase network First, second, third, and fourth resistors are coupled to first, second, third, and fourth capacitors. A first positive in-phase terminal is coupled to the first resistor and the first capacitor. A first negative in-phase terminal is coupled to the fourth resistor a... | 07/18/2006 |
| 7068089 | Digitally programmable I/Q phase offset compensation Delays are produced in differential signals using a variable capacitance provided by MOS varactors coupled between the differential signals. The capacitance values of the MOS varactors is controlled by a bias voltage applied to the bodies of the varactors. Selective... | 06/27/2006 |
| 6992526 | Apparatus and method for DC offset reduction A feedback system has a settling time that is independent of the forward gain of the amplifier stage, and a feedback path that is responsive to the magnitude of DC offset in the output signal. Settling time may be made independent of the forward gain of the amplifie... | 01/31/2006 |
| 6980046 | Charge pump circuit using active feedback controlled current sources A charge pump circuit utilizes active feedback control circuits to control the currents produced by sinking and sourcing current sources. The feedback control circuits may regulate the drain voltages of sinking and sourcing current source transistors to make them ap... | 12/27/2005 |
| 6965256 | Current mode output stage circuit with open loop DC offset reduction An output stage circuit for a current mode device provides open loop reduction or cancellation of DC offset in differential output signals. Differential input signals are received and sourcing current mirrors provide mirrors of the differential input signals to outp... | 11/15/2005 |
