Electronic channel selector with voltage memory circuit

Abstract From the Canadian patent

An electronic channel selector comprises a plurality of variable resistors, a plurality of switches connected to the variable resistors, respectively, and a voltage memory circuit. When one of the switches is closed the output voltage of the, variable resistor corresponding to the closed switch is transferred into and stored in the voltage memory circuit and in, response to the output voltage from the memory circuit the capacitance of a varactor may be varied for selecting a desired channel. The electronic channel selector in accordance with the present invention may be used instead of the conventional mechanical tuners, the channel selection may be much facilitated, the defects encountered …