Substrate bias generating circuit

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

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307297, 307200B, 307304, H03L 100, H03K 3353

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active

044712901

ABSTRACT:
A substrate bias generating circuit includes an oscillator circuit having a control terminal and a bias generating circuit for generating a negative substrate bias voltage responsive to the output signal of the oscillator circuit. The substrate bias generating circuit further includes a voltage divider connected between the output terminal of the bias generating circuit and a ground terminal, and a level sensor for producing a control signal to the oscillator circuit when it is detected that the output voltage of the voltage divider reaches a predetermined value, to thereby stop the oscillating operation of the oscillator circuit.

REFERENCES:
patent: 3806741 (1974-04-01), Smith
patent: 4142114 (1979-02-01), Green
patent: 4266151 (1981-05-01), Hoffmann et al.
patent: 4322675 (1982-03-01), Lee et al.
patent: 4344121 (1982-08-01), Weber
patent: 4388537 (1983-06-01), Kanuma
Martino et al., "An On-Chip Back Bias Generator for MOS Dynamic Memory", IEEE Journal of Solid-State Circuits, vol. SC-15, No. 5, (Oct. 1980), pp. 820-825.
"Fast Mostek ROM Has 350-ns Access", Electronics Magazine, Sep. 16, 1976, pp. 42 and 43.

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