Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing two electrode solid-state device
Patent
1996-02-14
1998-02-10
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing two electrode solid-state device
327493, 327583, H03K 1774
Patent
active
057173575
ABSTRACT:
An output circuit is provided for obtaining an output signal at one of two voltages regardless of the relative difference between the voltage levels. The output circuit includes a first switching circuit that contains two current sources for selectively producing one of two constant currents. A second switching circuit receives one of the two constant currents. The first and second switches are connected by four series-connected forward biased diodes. There are also bypass connectors for selectively providing current around the first and fourth diodes. An output terminal is located between the second and third diodes. A high voltage source is located between the first switching circuit and the first diode. A low voltage source is located between the fourth diode and the second switching circuit. Depending which of the current sources are actuated, the signal present at the output terminal is either that of the high voltage source or that of the low voltage source. The first and fourth diodes prevent current from the non-selected voltage source effecting the voltage of the output signal.
REFERENCES:
patent: 3818248 (1974-06-01), Pittman
patent: 4433303 (1984-02-01), Sasaki
patent: 4688001 (1987-08-01), Dijkmans et al.
patent: 4706039 (1987-11-01), Dijkmans et al.
patent: 4864249 (1989-09-01), Reiffin
Ando Electric Co. Ltd.
Callahan Timothy P.
Englund Terry L.
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