Pulse transformer for clock control pulses - derives minute switched pulses from half minute non-switched pulses and provides amplification

摘要

The pulse transformer receives an input train of half-minute pulses for which polarity is not changed, and provides an output train of one minute switched pulses, where for each successive minute the polarity of two output wires is reversed. Input pulses (14) are fed to an electronic circuit board (10) including a pulse receiving circuit (16). The pulses are passed to a calibrating (and if necessary inverting) stage (17). From here the new pulses are passed through an output amplifier (18) providing the second type of pulse (15). The last stages must be supplied by an independent current source comprising a charger (20) and accumulator (19). The charger derives its power from the input pulses via lines (21). The output signal is used to control clock displays.