Voltage level detecting circuit having a level converter

Details Voltage level detecting circuit having a level converter Voltage level detecting circuit having a level converter

1988-07-12

1989-10-10

Hudspeth, David

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307310, 307451, 3072961, H03K 1730

Patent

active

048734586

ABSTRACT:
A voltage level detecting circuit includes a resistance voltage divider, a level converter and an MOS driver arranged such that the detection characteristics are immune to temperature variations. The voltage divider has two resistive elements serially connected to each other to produce a divided voltage. The two resistive elements have different resistance variations to temperature change. The level converter has a threshold voltage and converts a divided voltage which is more than the threshold voltage from the voltage divider into a binary signal. The MOS driver produces a control signal on receipt of a binary signal from the level converter.

REFERENCES:
patent: 3975649 (1976-08-01), Kawagoe et al.
patent: 4008406 (1977-02-01), Kawagoe
patent: 4293782 (1981-10-01), Tanaka et al.
patent: 4301380 (1981-11-01), Thomas
patent: 4309627 (1982-01-01), Tabata
patent: 4473762 (1984-09-01), Iwahashi et al.
patent: 4504743 (1985-03-01), Aoyama et al.

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