Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1993-08-04
1995-11-21
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 94, 327 62, G01R 1900, H03K 5153
Patent
active
054690900
ABSTRACT:
A transistor circuit for detecting and holding a peak or bottom level of an input voltage includes a first transistor connected between a first power line and an output terminal, a capacitor connected between the output terminal and a second power line, a second transistor supplied with the input voltage and producing a current responsive to the input voltage, and a current mirror circuit supplied with the current from the second transistor as an input current and discharging the capacitor with an output current. The output current of the current mirror circuit is preferably designed to be smaller than a charging current to the capacitor from the first transistor.
REFERENCES:
patent: 3694748 (1972-09-01), Hekimian
patent: 4987323 (1991-01-01), Fujita
patent: 5038055 (1991-08-01), Kinoshita
patent: 5120995 (1992-06-01), Abdi
patent: 5254881 (1993-10-01), Leonowich
patent: 5315168 (1994-05-01), Norton, Jr.
NEC Corporation
Tran Toan
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