Switched capacitor signal scaling circuit

Details Switched capacitor signal scaling circuit Switched capacitor signal scaling circuit

2006-05-16

2006-05-16

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C341S172000, C341S143000

Reexamination Certificate

active

07046046

ABSTRACT:
A signal scaling circuit for accurately reducing the effective amplitude of an input signal by a rational factor N/M, where N and M are integers and N<M, is disclosed. An input, reference, bias and output node as well as control circuitry are selectively coupled to M switched capacitor circuits such that N/M scaling may be achieved. Cooperation between the M switched capacitor circuits and the control circuitry divides the M switched capacitors circuits into subsets of N and M−N switched capacitors, respectively. Each subset is then selectively coupled to an input, reference and/or bias signal to produce an output signal having as one of its components an N/M portion of the input signal. Error reduction in the scaled signal is achieved by shuffling the switched capacitor circuits populating each subset after selected time intervals.

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