Abstract: A circuit for converting an input DC value to a pulse signal of a given frequency, and including an integration circuit which receives as its input a composite DC signal which includes the DC value, and provides an integrated output therefrom. A hysteresis amplifier receives the integrated output, and in response thereto provides a binary output signal. A switching device having two states receives the binary output signal, and in response thereto, respectively switches between its two states. A pulse generating circuit is coupled to the switching device and produces a sequence of fixed pulses at a predetermined, noncritical rate. The switching device only permits the fixed pulses to be transmitted during one of its states. An output circuit which includes a counting device is coupled to the switching means and receives the fixed pulses which are transmitted by the switching device and counts them.