Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1989-07-27
1991-01-22
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307246, 307353, H03K 500, H03K 5153
Patent
active
049873237
ABSTRACT:
In a peak voltage holding circuit, a leakage circuit includes a first-stage mirror circuit, a second-stage mirror circuit, a selecting circuit, a capacitor, and a control circuit. The first-stage mirror circuit has one end connected to a second potential. The second-stage mirror circuit has one end connected to the output side of an input circuit and the other end connected to a first potential, and causes a current corresponding to a current which flows through the first-stage mirror circuit connected to the first potential to flow out from the voltage holding capacitor. The selecting circuit is connected the other end of the first-stage mirror circuit. The capacitor has one end connected to the selecting circuit and the other end connected to the first potential. The control circuit is connected to the selecting circuit and controls an operation of the selecting circuit. The selecting circuit alternately connects one end of the capacitor to the other end of the first-stage mirror circuit and the first potential at every arbitrary period.
REFERENCES:
patent: 4400633 (1983-08-01), Mouri
R. E. Penny, Dynamic Threshold Setting Circuit, IBM Technical Disclosure Bulletin, vol. 18, No. 6, Nov. 1975, pp. 1962-1965.
Handbook of Integrated Circuits: For Engineers and Technicians by John D. Lenk.
Circuit Design for Electronic Instrumentation by Darold Wobschall.
NEC Corporation
Zazworsky John
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