Patent ID: 6041223
Filing Date: 2000-03-21
Classification: H03D

Abstract:
A double balanced mixer circuit for mixing a first input signal with a second input signal oscillating between a positive voltage and a zero voltage at a higher frequency than said first signal, and providing an output signal comprising said first input signal modulated at the frequency of said second input signal, said double balanced mixer circuit comprising:a first solid state switching means for receiving said first input signal and said second input signal and transmitting said output signal, responsive to said second input signal having an amplitude of zero volts by being forward-biased, and coupling said first input signal to said output signal;a second solid state switching means for receiving said first input signal and said second input signal and transmitting said output signal, responsive to a complement of said second input signal having an amplitude of zero volts by being forward-biased, and coupling an inversion of said first input signal to said output signal; andmeans for electrically interconnecting said first solid state switching means with said second solid state switching means so that either one of said first or said second solid state switching means being in a forward-bias state provides a low voltage potential to the other of said solid state switching means against which said other of said solid state switching means becomes reversed-bias with respect to said positive voltage.