Reversible electrically variable active parameter trimming appar

Details Reversible electrically variable active parameter trimming appar Reversible electrically variable active parameter trimming appar

1978-11-29

1981-01-13

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307237, 307251, 307296R, 307303, 357 54, H03K 500, H03K 1760, H03K 326

Patent

active

042451655

ABSTRACT:
A continuously variable, reversible active circuit parameter trimming or adjustment method and apparatus are described. An active field effect transistor having a control gate to which a voltage is applied for the purpose of varying the conduction in the FET is achieved by supplying the control gate voltage from the stored voltage on a floating gate FET which has been charged to the desired variable level for controlling the conduction in the controlled FET at the desired operating point for parameter adjustment in an active circuit of which the FET may form a part. The floating gate FET structure can be electrically adjusted by charging or discharging the floating gate thereof which acts as a fixed memory to supply the appropriate control voltage to the controlled FET electrically connected thereto by a conductor connecting the control gate of the FET with the floating gate in the trimming or parameter adjustment floating gate FET element.

REFERENCES:
patent: 3275911 (1966-09-01), Onodera
patent: 3436623 (1969-04-01), Beer
patent: 3721838 (1973-03-01), Brickman et al.
patent: 3795974 (1974-03-01), Calhoun
patent: 3836992 (1974-09-01), Abbas et al.
IBM Tech. Dsclre. Bttn., Fusible Link Device, L. Ewald et al., vol. 19, No. 8, Jan. 77, pp. 3089-3090.

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