Bias voltage generation circuit

Details Bias voltage generation circuit Bias voltage generation circuit

1994-02-25

1996-04-09

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327534, 327540, G05F 110, G05F 302

Patent

active

055065406

ABSTRACT:
A bias voltage generation circuit has a bias voltage generation means and a VBB detector. The bias voltage generation means is made up of a charge pump circuit, and a ring oscillator for biasing a P-type region to have a predetermined potential level. The VBB detector detects the bias level of the P-type region and controls the bias generation means. The VBB detector incorporates a bias level detection circuit, and two delay circuits which are controlled on the basis of a signal appearing at an output node N2 of the bias level detection circuit. The ring oscillator is controlled on the basis of outputs of the two delay circuits. One of the two delay circuits has a higher detection level and is therefore less responsive to the signal at the output node N2 than the other delay circuit, but provides a shorter delay time than that provided by the other delay circuit.

REFERENCES:
patent: 4223238 (1980-09-01), Parkinson et al.
patent: 4631421 (1986-12-01), Inoue et al.
patent: 4794278 (1988-12-01), Vajdic
patent: 4961007 (1990-10-01), Kumanoya et al.
patent: 5034625 (1991-07-01), Min et al.
patent: 5243228 (1993-09-01), Maruyama et al.
patent: 5264808 (1993-11-01), Tanaka
patent: 5315166 (1994-05-01), Arimoto
patent: 5341035 (1994-08-01), Shibayama et al.

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