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A simple method of generation of a delay period with excellent supply voltage insensitivity over a wide range extending from a few nanoseconds to several seconds is described. The circuit uses half of a differential amplifier linear IC chip, a timing capacitor and few other components. The rise and fall times of the waveform were found to be only a few nanoseconds and to remain constant over the entire delay range. The unique feature of the circuit is that the delay period stability was found to be better than 0.5% even at the smallest period for 50% variation of the positive power supply and 30% variation of the negative supply. The temperature stability of the circuit is inherent due to the use of the IC chip. The minimum delay period was found to be 60 nsec and the maximum was limited by the value of the timing capacitor. [ABSTRACT FROM AUTHOR]