Multi-phase rectangular-wave generator

The generator consists essentially of two distinct parts. A rectangular-wave oscillator, based on IC1, generates two signals which may be phase-shifted between 00 and 3600 with respect to one another. The frequency of the signal at a supply voltage of 5 V is around 1 kHz and at a supply voltage of 12 V about 1.4 kHz. The stage-based on by-eight-counter/divider IC2 provides eight signals. each of which is 45° out of phase with the preceding and the following signal. The output of IC1a may be shifted between

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