Bias voltage generator for semiconductor integrated circuit, has decoder that outputs trimming information for bias voltage by decoding comparison signal of reference bias voltage and bias voltage

摘要

A bias voltage generation circuit generates a bias voltage which is automatically trimmed using a reference bias voltage as a reference voltage. A voltage comparator compares the reference bias voltage with the generated bias voltage to output a comparison signal. A decoder decodes the comparison signal and outputs the result of decoding as a trimming information for the bias voltage to the bias voltage generation circuit. An independent claim is included for method for automatically trimming bias voltage.