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Richard Stary

Yves Theoduloz

Petr Drechsler

Yves Théoduloz

A method adjusts a reference voltage of an electronic circuit based on a band-gap voltage supplied by a first band-gap stage. The band-gap stage includes in a series arrangement, between two terminals of a voltage supply source, a current source connected to a first branch, which includes a first configurable resistor in series with a first diode, and to a second branch, which includes a second configurable resistor connected to a complementary resistor in series with a second diode. The band-gap voltage is supplied to a connection node between the current source and each branch. The current source is a PMOS transistor controlled by an output voltage of a first operational amplifier of a current control loop. An appropriate binary word for configuring the configurable resistors is determined based on four band-gap voltage values measured at two different temperatures and two resistive values of the resistors configured by the same first binary word and by the same second binary word which is different from the first binary word.

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Prague, Czechia

Richard Stary