| 摘要 |
A pair of transistors (TR1, TR2) are serially connected through an inductor (L) to a supply with associated components connected to the transistors which determine various periods of operation. In order to ensure that the transistors (TR1, TR2) are rendered non-conducting simultaneously sensors (S1, S2) sense their change in base current to produce pulses in monostable multivibrators (M1, M2) whose relative phases are compared in a digital phase comparator (PC). The drive for each transistor (TR1, TR2) from its associated driver stage (DR1, DR2) is via an associated device (DC1, DC2) having a characteristic used to control the cut-off of its associated transistor one of the devices (DC2) having a variable characteristic which is controlled by the output of the phase comparator (PC) to ensure the required simultaneous non-conduction.
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