Monolithic autobiased resistor structure and application thereof

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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357 51, 307296A, 307296R, 307351, 361 91, H01L 2704, H02H 904, H03K 301, H03K 5153

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active

045786950

ABSTRACT:
A monolithically integrated resistive attenuator is autobiased from an input bipolar signal the amplitude of which is higher than the integrated circuit voltage supplies. The resistive attenuator is arranged in a first pocket formed in an epitaxial layer, and is connected between the input bipolar signal and ground. An intermediate tap produces an output signal. A diode and capacitor are formed in a second pocket. The diode is connected between the input bipolar signals and the epitaxial layer while the capacitor is connected between the epitaxial layer and the isolation walls thereof. The positive half-periods of the input bipolar signal charges the capacitor, which in turn biases the epitaxial layers. The attenuator, therefore, can be monolithically integrated into a silicon chip and remain isolated for all values of the input bipolar signal. The output signal produced by the attenuator is less than the integrated circuit voltage supplies so that the circuits driven by the output signal can be integrated without difficulties.

REFERENCES:
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patent: 3940785 (1976-02-01), Genesi
patent: 3990092 (1976-11-01), Yoshimura
patent: 4024417 (1977-05-01), Heuber et al.
patent: 4164668 (1979-08-01), Delaporte et al.
patent: 4181878 (1980-01-01), Murari et al.
patent: 4340922 (1982-07-01), Delaporte et al.
patent: 4454647 (1984-06-01), Joy et al.
patent: 4466011 (1984-08-01), Van Zanten
IBM Tech. Disclosure Bulletin, "DC Bias for EPI Pocket Pulse Appli.", vol. 13, No. 6, Nov. 1970, p. 1645.
Motorola Series in Solid-State Electronics, "Integrated Circuits, Design Principles and Fabrication", The Engineering Staff, Motorola, Inc., McGraw Hill, 1965, pp. 255-264.
IBM Technical Disclosure Bulletin, vol. 14: No. 11, Apr. 1972, "Low-Capacitance Diffused Resistor", Calhoun and Kaufman, p. 3339.

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