Patent ID: 8294504
Filing Date: 2012-10-23
Classification: H03K

Abstract:
1. A device for generating a signal indicative of a fixed delay of time based on an input clock with a variable frequency, the device comprising: a memory configured to store a count-by value representing a number of predetermined time-units between a first edge of the input clock in a first cycle and a second edge corresponding to the first edge of the input clock in a second cycle subsequent to the first cycle; a count circuit, coupled to receive the count-by value from the memory, the count circuit configured to increase or decrease a count-value output by the received count-by value responsive to receiving the second edge of the input clock; and a comparison circuit, coupled to receive the count-value from the count circuit, the comparison circuit configured to determine lapse of the fixed delay of the time by comparing the count-value to a fixed value corresponding to the fixed delay of time.