Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing three or more electrode solid-state device
Patent
1993-12-08
1996-04-02
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing three or more electrode solid-state device
327328, 327333, 327391, 327434, H03K 17687, H03K 508
Patent
active
055044506
ABSTRACT:
A high voltage circuit for an electronic erasable programmable read only memory (EEPROM) integrated circuit (IC) is implemented using lower voltage semiconductor components. In the preferred embodiment, the circuit is capable of switching a twenty-four volt signal using p-channel metal-oxide semiconductor field effect transistors (MOSFETs) with a rated breakdown voltage not exceeding twelve volts. In the preferred embodiment, the circuit switches a driver signal in response to a first control signal. The circuit includes a first switch, connected between ground and an output, for selectively connecting the output to ground in response to the first control signal; a second switch, connected between the driver signal and the output for selectively connecting the driver signal to the output in response to a second control signal; a third switch for receiving the driver signal and the first control signal and for generating the second control signal, where the third switch includes a plurality of transistors and the driver signal is distributed across the plurality of transistors so that the driver signal is not across any single transistor; and a voltage divider circuit for dividing the driver signal into a plurality of lower voltage signals for controlling the third switch, wherein a magnitude of at least one of the lower voltage signals is controlled by the first control signal.
REFERENCES:
patent: 4721866 (1988-01-01), Chi et al.
patent: 4933579 (1990-06-01), Isobe et al.
patent: 4996446 (1991-02-01), Nakada
patent: 5029283 (1991-07-01), Ellworth et al.
patent: 5077518 (1991-12-01), Han
patent: 5128560 (1992-07-01), Chern et al.
patent: 5278460 (1994-01-01), Casper
AT&T Corp.
Cunningham Terry
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