Patent ID: 6049358
Filing Date: 2000-04-11
Classification: G01R,G09G,H03K,H04N

Abstract:
A counter control circuit for measurement of a period of a pulse signal, comprising:a clock generator for producing a series of clock pulses having the same period;a counter for counting the clock pulses fed from the clock generator in response to receipt of a start signal, and for outputting a count value indicating measurement of the period of each pulse of the pulse signal in response to receipt of a latch signal;a controller in response to the pulse signal to generate sequential control signals during the receipt of the pulse signal differentiated by the clock pulses;a stop signal generator in response to a first combination of the sequential control signals to produce a stop signal supplied to the counter to stop counting the clock pulses at a preset time point within the period of each pulse of the pulse signal;latch signal generator in response to a second combination of the sequential control signals to produce the latch signal supplied to the counter to latch the count value of the counter at a time point within a stop signal duration; anda start signal generator in response to a third combination of the sequential control signals to produce the start signal supplied to the counter to restart the counting at the time point after the latch signal is generated.