Capacitor structure and circuit facilitating increased frequency

Details Capacitor structure and circuit facilitating increased frequency Capacitor structure and circuit facilitating increased frequency

1975-11-06

1977-05-31

Rolinec, Rudolph V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

307109, 330 38M, 330 40, 333 80T, H03F 304

Patent

active

040272710

ABSTRACT:
A stabilizing circuit which increases the effective value of a capacitor and the structure of a monolithic capacitor are disclosed. The stabilizing circuit includes a transistor having a base electrode connected to the capacitor and an emitter electrode connected to a point at which it is desired to provide an increased effective capacitance. The capacitor structure is suitable for being included in monolithic integrated circuits having diffused isolation regions. A first plate of the capacitor is formed by a metallization layer, the second plate of the capacitor may be formed by an emitter diffusion into the isolation diffusion. A base diffusion which is conductively connected to the emitter diffusion and to the isolation diffusion facilitates connection of the second plate of the capacitor to the substrate.

REFERENCES:
patent: 3553609 (1971-01-01), Edge
patent: 3702405 (1972-11-01), Zwirn

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