Switched capacitor arrangement

Details Switched capacitor arrangement Switched capacitor arrangement

1987-12-23

1989-06-06

Shoop, Jr., William M.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

375 28, 341167, 341172, H03K 700

Patent

active

048375276

ABSTRACT:
An integrator of a Sigma-Delta modulator includes an amplifier having an inverting input terminal and an output terminal. AN integrating capacitor is coupled between the input and output terminals. An input signal is coupled via a switched capacitor arrangement to the input terminal. The switched capacitor arrangement includes first and second transmission gates, operating at a first frequency, and a second capacitance that are coupled in series. In each period of the operation of the transmission gates, the first transmission gate is turned off before the second transmission gate for preventing a charge injected by the second transmission gate when the second transmission gate is turned off from being coupled to the input terminal of the amplifier.

REFERENCES:
patent: 3614645 (1971-10-01), Wheatley
patent: 4600901 (1986-07-01), Rabaey
patent: 4625155 (1986-11-01), Dietz
A technical paper entitled THAM 11.5: A 120 KHZ Signal Delta A/D Converter, published in ISSCC Digest of Technical Papers, pp. 138-139; Feb., 1986, in the names of R. Koch, et al.
An article published in IEEE Transactions on Communications, vol. Com-33, No. 3, Mar. 1985, entitled, A Use of Double Integration in Sigma Delta Modulation, in the name of James C. Candy.
A textbook entitled Switched Capacitor Circuits, in the names of Philip E. Allen and Edgar Sanchez-Sinencio, dated 1984, p. 94 and cover page.
An article published in IEEE Transactions on Circuits and Systems, vol. Cas -25, No. 7, Jul. 1978 entitled, A Sigma-Delta Modulator as an A/D Converter, in the name of Rudy J. Van DePlassche.
U.S. Application Ser. No. 137,229 entitled, A Modified Cascode Amplifier, in the Name of Doanld Sauer that was Filed Concurrently Herewith.

Affiliated with

Also associated with

Rating

Switched capacitor arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switched capacitor arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched capacitor arrangement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-42560