Circuit arrangement for controlling the operating functions of a broadcast receiver

Claim 1

A circuit arrangement for controlling the operating functions of a device, in which an up/down counter is associated with each operating function, of which the particular count corresponds to a certain setting of the operating function and which comprises an up-counting input and a down-counting input and, in dependence upon function control signals at these inputs, counts pulses supplied by a clock-pulse generator, wherein two threshold-value circuits each having an input, an output and different threshold values are provided for each operating function, said threshold-value circuit inputs being coupled together and said threshold-value circuit outputs being connected to the up-counting input and to the down-counting input, respectively, of the associated up-down counter, and wherein in dependence upon the value of a voltage delivered to their interconnected inputs, each of said threshold-value circuits furnishes a function control signal having one or the other binary signal value, and wherein further the interconnected inputs of the threshold-value circuits are connected to switch means which permit one of several voltage values to be applied thereto in accordance with a required setting of the operating function, whereby only a single conductor from said switch means to said threshold-value circuits is required to control each of said operating functions.