Patent ID: 6784746
Filing Date: 2004-08-31
Classification: H03F

Abstract:
A circuit for correcting thermal deviations of an output signal comprising:a thermal sensing unit including a first transistor that is connected to generate a temperature-dependent signal in response to a first input signal, said temperature-dependent signal including an error caused by a voltage change induced by an effective base width variation of said first transistor in responding to said first input signal; and an error compensating unit connected to said thermal sensing unit, said error compensating unit including a second transistor that is connected to generate a correcting signal in response to said temperature-dependent signal, said second transistor being further connected to be responsive to an inverse signal of said first input signal to introduce a reverse error into said correcting signal to compensate effects of said error on said correcting signal, said correcting signal corresponding to said thermal deviations of said output signal such that said correcting signal can be used to reduce said thermal deviations of said output signal.