Linearization technique for analog to digital converters

Details Linearization technique for analog to digital converters Linearization technique for analog to digital converters

1999-10-08

2000-12-26

Pascal, Robert

Amplifiers

With periodic switching input-output

330 51, 327124, 341172, H03F 102

Patent

active

061665959

ABSTRACT:
A switched capacitor voltage amplifier having at least one signal input, at least one reference input, an output and a plurality of clock inputs, comprising a high voltage gain (e.g. 100 dB) operational amplifier having an inverting input, a non-inverting input and an output, a plurality of switched capacitors which in the even clock phase are connected between said operational amplifier's inverting input or the switched capacitor's reference input and the switched capacitors amplifier's signal input, in the odd clock phase, however, connecting at least one of said switched capacitors between the operational amplifier's inverting input and the operational amplifier's output while the rest of said switched capacitors being connected between the operational amplifier's inverting input and a reference input, control means for selecting if each of the switched capacitors should be connected to the switched capacitor amplifier's signal input, reference input or output, and a pseudo random binary number generator, clocked by the same clock, clocking the switched capacitor amplifier, thereby controlling said control means such that the voltage gain of the switched capacitor amplifier, averaged over several clock cycles, being exactly equal to a rational number.

REFERENCES:
patent: 4210872 (1980-07-01), Gregorian
patent: 4331894 (1982-05-01), Gregorian et al.
patent: 4511851 (1985-04-01), Wurzburg
patent: 4543534 (1985-09-01), Temes et al.
patent: 5410270 (1995-04-01), Rybicki et al.
patent: 5479130 (1995-12-01), McCartney

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