Switched capacitor feedback sample-and-hold circuit

Details Switched capacitor feedback sample-and-hold circuit Switched capacitor feedback sample-and-hold circuit

1984-10-18

1986-04-29

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307359, 307491, 307572, G11C 2702

Patent

active

045859566

ABSTRACT:
A feedback sample and hold circuit bank (10) of 24 stages (12) is described. The bank (10) is of the type having an operational amplifier common to all the stages (12) and having its output connected to each stage (12) through a sampling switch (S.sub.S) to the input of a buffer (B). A holding capacitor (C.sub.H) is connected between input of the buffer (B) and ground potential. A correction coupling capacitor (C.sub.CC) and a correction holding capacitor (C.sub.CH) are connected respectively in series between the input of the buffer (B) and ground. A correction switch S.sub.C is connected between the amplifier output (14) and the common node (22) of the correction capacitors (C.sub.CC, C.sub.CH). When the sampling switch (S.sub.S) opens for the hold condition, the correction switch (S.sub.C) briefly remains closed to permit the amplifier (A) to correct the hold voltage for switching charge feedthrough error from the sampling switch (S.sub.S) by charging the correction holding capacitor (C.sub.CH). The correction coupling capacitor (C.sub. CC) couples this correction in attenuated form to the holding capacitor (C.sub.H). Also disclosed is a modification (24) including a connection zeroing switch (S.sub.CZ) which periodically zeroes the common node (22) of the correction capacitors (C.sub.CC), (C.sub.CZ) so that large signal amplitudes can be better corrected.

REFERENCES:
patent: 3586880 (1971-06-01), Fitzwater, Jr.
patent: 4308468 (1981-12-01), Olson
patent: 4331894 (1982-05-01), Gregorian et al.
patent: 4352070 (1982-09-01), Beauducel et al.
S. K. Sunter et al, A Programmable Transversal Filter for Voice-Frequency Applications", IEEE Jour. of Solid-State Circuits, vol. SC-16, No. 4, Aug. 1981, pp. 367-371.

Affiliated with

Also associated with

Rating

Switched capacitor feedback sample-and-hold circuit 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 feedback sample-and-hold circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched capacitor feedback sample-and-hold circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-142882