Multiplexing arrangement for a plurality of voltage controlled filters

摘要: A multiplexing arrangement enables a plurality of control voltages for controlling respective ones varactor controlled tunable filters, employed, e.g., prior to the tuner television receiver reject undesired signals, be generated by single digital analog (D/A) converter. controller, which may, comprise microcomputer, sequentially applies words D/A converter and substantially synchronously causes resultant applied, through switches filters. The are applied capacitors connected d.c. lines high impedance diodes included in filters store relatively long intervals before need refreshed. This large number