Amplifiers – With periodic switching input-output
Patent
1999-05-12
2000-09-19
Pascal, Robert
Amplifiers
With periodic switching input-output
330 51, 330254, 327307, H03F 102, H03F 114, H03F 345, H03L 500
Patent
active
061218316
ABSTRACT:
An offset-removing gain circuit where the detected offset is independent of the gain of the circuit. The gain circuit includes a differential amplifier transfer circuit with an input and a output, an integrator connected to the output of the differential amplifier transfer circuit through a first impedance, and a second impedance connecting an output of the integrator to the input of the differential amplifier. The impedances may include resistors, capacitors or combinations thereof. The circuit may further include a switched capacitor circuit, where a plurality of capacitors are connected between input and output terminals using switches, whereby the capacitance of the switched capacitor circuit is altered by the switches to remove offset at the integrator output without changing the frequency response thereof.
REFERENCES:
patent: 3764922 (1973-10-01), Gilbert et al.
patent: 4653117 (1987-03-01), Heck
patent: 4801888 (1989-01-01), Haque
patent: 4873702 (1989-10-01), Chiu
patent: 4944025 (1990-07-01), Gehring et al.
patent: 5086437 (1992-02-01), Tomita
patent: 5107225 (1992-04-01), Wheatley, III et al.
patent: 5264804 (1993-11-01), Fox
patent: 5269313 (1993-12-01), DePinto
patent: 5394109 (1995-02-01), Simard
patent: 5436590 (1995-07-01), Simard et al.
patent: 5452473 (1995-09-01), Weiland et al.
patent: 5465272 (1995-11-01), Smith
patent: 5508656 (1996-04-01), Jaffard et al.
patent: 5617060 (1997-04-01), Wilson et al.
patent: 5748681 (1998-05-01), Comino et al.
patent: 5757219 (1998-05-01), Weedon et al.
patent: 5793230 (1998-08-01), Chu et al.
patent: 5798664 (1998-08-01), Nagahori et al.
Cho, T. et al., "A Power-Optimized CMOS Baseband Channel Filter and ADC for Cordless Applications", pp. 1-4 (Aug. 10, 1998).
Level One Communications Inc.
Nguyen Patricia T.
Pascal Robert
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