Patent ID: 6188261
Filing Date: 2001-02-13
Classification: G06F,H03K,H03L,H03M

Abstract:
A programmable delay generator comprising:a first ramp wave generator and a second ramp wave generator, each having a capacitor of the same capacitance as each other for generating a ramp wave by flowing a current in said capacitor, each of them operating with external common clock pulses, and each of them providing a potential gradient and a final potential incorporated with an external set data; anda comparator for comparing an output (V.sub.s) of the first ramp wave generator and an output (V.sub.k) of the second ramp wave generator so that an output pulse is provided when the outputs of two ramp wave generators coincide with each other, whereinsaid first ramp wave generator providing a ramp voltage (V.sub.s) upon receipt of a first set data (S) at a predetermined time (t.sub.0),said second ramp wave generator providing a threshold voltage (V.sub.k) upon receipt of a second set data (K) at a time which precedes said predetermined time (t.sub.0) by at least one clock time (T),said comparator providing an output pulse delayed by delay time (t.sub.d) which is proportional to ratio (K/S) of said second set data (K) and said first set data (S) from said predetermined time.