Abstract: A mixed signal integrated circuit includes a signal source to inject a test signal into the signal path of the mixed signal integrated circuit, a feedback loop and a signal comparator for determining characteristics of a resulting signal. Conveniently, the test signal may be a digital signal injected upstream of a digital to analog converter (DAC). By connecting the output to the input, the entirety of the signal path and the majority of the integrated circuit may be tested. The signal may be condition or manipulated in the feedback loop. By incorporating test signal generation and measurement into the mixed signal integrated circuit, the cost of test equipment and the test duration for each device under test may be reduced.

Abstract: A high current drive bandgap based voltage regulator for providing a reference voltage at a an output voltage at a designed output voltage value. The high current drive bandgap based voltage regulator includes a high current drive output transistor, a feedback network, an output terminal and an operational amplifier. The feedback network is coupled between the output of the transistor and the input of the transistor. The operational amplifier is in the feedback network and has at least two operational amplifier input terminals and an operational amplifier output terminal. The operational amplifier output terminal is coupled to the transistor input terminal, and the operational input terminals are coupled to the transistor output terminal. The output terminal of the high current drive bandgap based voltage regulator is coupled to the output of the high current drive transistor.

Abstract: A high current drive bandgap based voltage regulator for providing a reference voltage at a an output voltage at a designed output voltage value. The high current drive bandgap based voltage regulator includes a high current drive output transistor, a feedback network, an output terminal and an operational amplifier. The feedback network is coupled between the output of the transistor and the input of the transistor. The operational amplifier is in the feedback network and has at least two operational amplifier input terminals and an operational amplifier output terminal. The operational amplifier output terminal is coupled to the transistor input terminal, and the operational input terminals are coupled to the transistor output terminal. The output terminal of the high current drive bandgap based voltage regulator is coupled to the output of the high current drive transistor.