Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1979-03-09
1981-04-14
Dixon, Harold A.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307362, 307313, H03K 522, H03K 5153
Patent
active
042622212
ABSTRACT:
A high sensitivity voltage comparator circuit, suitable for integration in monolithic form is disclosed. First and second p-channel field effect transistors, FETs, are arranged as a first cascode amplifier between a relatively positive supply potential and an output node. First and second n-channel FETs are arranged as a second cascode amplifier similar to the first which is connected between a source of relatively negative supply potential and the same output node. Bias potentials are selectively applied to each of the gate electrodes of the FETs to balance the composite amplifier concurrently with application of a reference signal via input coupling capacitor, to the amplifier inputs. Subsequently signal potential is selectively applied to the amplifier inputs, to the exclusion of the reference potential.
REFERENCES:
patent: 3676702 (1972-07-01), McGrogan
patent: 3870966 (1975-03-01), Dingwall
patent: 3914702 (1975-10-01), Gehweiler
patent: 4000412 (1976-12-01), Rosenthal
patent: 4004158 (1977-01-01), Morgan
patent: 4045747 (1977-08-01), Hsu
patent: 4047059 (1977-09-01), Rosenthal
patent: 4103190 (1978-07-01), Beutler
patent: 4160176 (1979-07-01), Takahashi
patent: 4169233 (1979-09-01), Haraszti
"A 1 mV MOS Comparator" by Y. S. Yee et al., IEEE-JSSC, vol. SC-13 No. 3, Jun. 1978, pp. 294-297.
Dixon Harold A.
Herrmann E. P.
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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