ANALOG TIMER CIRCUIT WITH TIME CONSTANT MULTIPLICATION EFFECT

摘要

An analog timer circuit comprises a pulse source, a charge storage element, and a charge pump coupled between the pulse source and the charge storage element. A pulse signal generated by the pulse source is utilized to charge the charge storage element via the charge pump. The analog timer may further comprise a discharge pump coupled between the pulse source and the charge storage element. The pulse signal generated by the pulse source is also utilized to discharge the charge storage element via the discharge pump. For example, the charge pump and the discharge pump may be driven by respective ones of complemented and uncomplemented versions of the pulse signal generated by the pulse source. An up/down driver circuit is configured to select between charging of the charge storage element via the charge pump and discharging of the charge storage element via the discharge pump.

主权项

1. An analog timer circuit comprising:
a pulse source; a charge storage element; a charge pump coupled between the pulse source and the charge storage element; and a charge distribution circuit coupled between the charge pump and the charge storage element; wherein the charge distribution circuit comprises first and second circuit paths separating energy from the charge pump into respective first and second portions; the first circuit path providing the first portion of the charge pump energy to the charge storage element; and the second circuit path diverting the second portion of the charge pump energy away from the charge storage element; wherein a pulse signal generated by the pulse source is utilized to charge the charge storage element via the charge pump.