Switched capacitor resonator and sigma-delta modulator using...

Details Switched capacitor resonator and sigma-delta modulator using... Switched capacitor resonator and sigma-delta modulator using...

2011-03-08

2011-03-08

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

Reexamination Certificate

active

07902916

ABSTRACT:
Provided is a switched capacitor resonator including at least one integrator circuit having a differential operational amplifier and a sub feedback circuit configured with a switched capacitor circuit. A main feedback circuit connecting main input and output terminals of the switched capacitor resonator to each other may be configured with the switched capacitor circuit. The main feedback circuit may be connected to the sub feedback circuit included in one of the integrator circuits. A capacitor of the main feedback circuit can serve as an integration capacitor connected between the input and output terminals of the differential operational amplifier. Consequently, it is possible to improve an operating speed by reducing a settling time constant of the integrator circuit.

REFERENCES:
patent: 5442353 (1995-08-01), Jackson
patent: 5982315 (1999-11-01), Bazarjani et al.
patent: 2003-0045073 (2003-06-01), None

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