The Beard "I WAS bald!"), Elaine angrily throws his wig out the window, and the homeless guy picks it up. After the date, Elaine invites Robert to her apartment. Wig-less George tells Jerry he is again himself, and will continue seeing the bald woman; he then tells Jerry, who is going to take the lie detector test, that a lie is not a lie if he believes it. Later, Elaine triumphantly announces to Jerry that Robert has defected from his team and that the conversion went perfectly ("Sex and shopping"). Afterwards, Kramer is still doing police lineups. Jerry takes the lie detector
Detector (radio) local oscillator, hence the name. By heterodyning, the received signal is mixed (in some type of nonlinear device) with a signal from the local oscillator, to give sum and difference frequencies to the signals being mixed, just as a "first mixer" stage in a superhet would produce an intermediate frequency; the beat frequency in this case, the low frequency modulating signal is recovered and the unwanted high frequencies filtered out from the output of the product detector. Product detector circuits are and so essentially ring modulators or synchronous detectors and closely related to some phase-sensitive detector circuits. They can be