Precise control of vce in close to saturation conditions

Details Precise control of vce in close to saturation conditions Precise control of vce in close to saturation conditions

H - Electricity

03

K

H03K 17/60 (2006.01) G05F 3/22 (2006.01)

Patent

CA 2302900

A pull-down circuit uses an npn transistor operating at close to saturation and the collector/emitter voltage is used as the pull-down voltage. To keep this within strict limits the npn transistor is connected in circuit with other transistors and resistors as well as a current source that generates a current proportional to absolute temperature. By selecting the values of the resistors and transistor parameters the collector/emitter voltage may be kept stable within a small range over wide temperature variation.

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