RECEIVER TUNING CIRCUIT HAVING A TUNING VOLTAGE MEMORY CIRCUIT FOR TUNING OF ELECTRONICALLY TUNED RECEIVERS

摘要

1512662 Analogue stores UNITECH PRZEDSIEBIORSTWO TECHNICZNOHANDLOWE 25 April 1975 [6 May 1974] 17144/75 Heading G4G [Also in Division H3] The Specification discloses an analogue store, Fig. 2, including electrochemical integrator devices 8, 8SP1/SP for use in a receiver tuning circuit (see Division H3). The devices can be connected in series with a tuning voltage storage capacitor 7 by a switch 9 so that one of the devices stores the charged state of the other device when the capacitor 7 is charged from a charging circuit (6, Fig. 1, not shown) to a voltage representing a received station corresponding to a stored state of the other device. The charging circuit (6) is stopped by a step detector (10) which detects when metal from the storage electrode of the other device has been transferred to its output electrode. Closing a switch 13 allows only one device to switch on so that a stored tuning selection can be cancelled. A sored state is then provided in one of the devices by reversing the switch 9 and charging the capacitor 7 by circuit (6) until a new station is selected. Pairs of these devices can be connected to store sequential stations which a signal reading receiver stops on (Fig. 3, not shown).