Oscillation circuit with frequency dependent on incident light

Details Oscillation circuit with frequency dependent on incident light Oscillation circuit with frequency dependent on incident light

1980-11-26

1982-11-02

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

Temperature or light responsive

331111, H03K 3353

Patent

active

043575811

ABSTRACT:
An oscillation circuit for providing oscillation frequencies which vary in response to the intensity of incident light rays. The circuit comprises a capacitance for storing charges and a charging circuit; said stored charges being decreased in response to an increase in the intensity of light rays incident on the capacitance; the charging circuit connected to the output of the oscillation circuit; the charging circuit being adapted to charge the capacitance. The oscillation circuit, when adapted to a bootstrap circuit in an EPROM erasable by means of ultraviolet rays, improves the write-in efficiency thereof.

REFERENCES:
patent: 2862416 (1958-12-01), Doyle
patent: 3599116 (1971-08-01), Spence et al.
patent: 3938108 (1976-02-01), Salsbury et al.

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