USE OF A THERMISTOR WITHIN A REFERENCE SIGNAL GENERATOR

摘要

Reference signal generators using thermistors are disclosed. An apparatus includes a first device having a first temperature coefficient and a thermistor having a second temperature coefficient having a sign opposite to that of the first temperature coefficient. A circuit maintains equivalence of a first signal and a second signal and offsets a first temperature variation of the first device using a second temperature variation of the thermistor to generate the second signal having a low temperature coefficient. The first device may be a bipolar transistor configured to generate a base-emitter voltage and coupled in series with the thermistor. The first signal may be a first voltage on a first node. The second signal may be a second voltage on a second node. The circuit may be configured to maintain effective equivalence of the first voltage and the second voltage. The apparatus may include a resistor coupled to the second node.

主权项

1. An apparatus comprising:
a first device having a first temperature coefficient; a thermistor having a second temperature coefficient, the second temperature coefficient having a sign opposite to a sign of the first temperature coefficient; and a circuit configured to maintain equivalence of a first signal and a second signal and further configured to offset a first temperature variation of the first device using a second temperature variation of the thermistor to generate the second signal having a low temperature coefficient.