Abstruct-A phase-lock loop occasionally will take a long time to settle to equilibrium. Phase dwells at a large error for a prolonged in- terval. This phenomenon has been dubbed “hangup.” The periodic nature of phase detectors is responsible fo r ha
An 840-GHz Schottky diode detector is integrated with an analog lock-in amplifier in 130-nm bulk CMOS. The integrated lock-in amplifier can support a modulation frequency of up to 10MHz with a gain of 54dB, a dynamic range of 42dB, and an input refe
