Power-efficient sample and hold circuit using bipolar transistor

Details Power-efficient sample and hold circuit using bipolar transistor Power-efficient sample and hold circuit using bipolar transistor

1992-06-08

1994-05-24

Callahan, Timothy P.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307321, 307257, H03K 524, H03K 1774

Patent

active

053151690

ABSTRACT:
A diode bridge includes a plurality of diodes for coupling an input voltage signal to a holding capacitor for sampling when the diodes are forward biased, and uncoupling the voltage signal from the capacitor for holding when the diodes are reverse biased. The diode bridge has first and second bias current nodes. A constant current drain causes a constant bias current to flow out of the bridge. A transistor connects the first node to the drain for forward biasing the diodes, whereas a transistor connects the second node to the drain for reverse biasing the diodes. A bootstrap amplifier (A2) produces a variable control voltage which controls a pair of voltage-controlled constant current sources to cause the constant bias current to flow therethrough into the bridge. A transistor (Q7) couples the control voltage to the first current source for forward biasing the diodes, whereas a transistor couples the control voltage to the second current source for reverse biasing the diodes. The transistors are all bipolar and of the same conductivity type, preferably NPN.

REFERENCES:
patent: 3480795 (1969-11-01), Benson et al.
patent: 3721829 (1973-03-01), Benson
patent: 4209711 (1980-06-01), Barker
patent: 4659945 (1987-04-01), Metz

Affiliated with

Also associated with

Rating

Power-efficient sample and hold circuit using bipolar transistor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power-efficient sample and hold circuit using bipolar transistor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power-efficient sample and hold circuit using bipolar transistor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1974959