in individual power supplies the master control is periodically coupled to individual power supplies by multiplexing means to provide compensation signals to counter drifts and errors due to varying circuit parameters therein application_number US 6925979 A description a digitally controlled regulator disclosed in fig1 is suitable for operation in conjunction with a multiplexed central digital control system switch 10 periodically conducts to couple a dc voltage source 11 via a filter 12 to an output load 13 the duty cycle of the switch 10 determines the magnitude of the output voltage a periodic cycle of operation is determined by a clock circuit 14 which resets a counter 15 at the beginning of each switching cycle and also enables a voltage controlled oscillator 16 to respond to the output voltage of the regulator the frequency of the voltage controlled oscillator 16 is determined by the magnitude of the output voltage sensed via lead 17 counter 15 counts the output pulses of the voltage controlled oscillator 16 and applies the accumulating count to a comparator circuit 18 also connected to the comparator circuit 18 is a reference count source 19 which is preset to a reference count the increasing count of the counter 15 is continuously applied to the comparator 18 which responds when the continuously increasing generated count equals the reference count an output 20 of the comparator 18 is applied to control the switch 10 in a conducting condition as long as the reference count a exceeds the accumulating count b i e a gt b generated in response to the voltage controlled oscillator 16 and in a nonconducting condition when the accumulating count b equals and exceeds the reference count a i e a u2266 b as soon as.