DIGITAL CONTROLLED OSCILLATOR

摘要

The oscillating frequency of an oscillator is controlled by external digital signal and a simple oscillating frequency controller. The digitally controlled oscillator comprises counter (1) connected to the external phase control terminal and the frequency control terminal to generate phase control bit, a latch (2) for latching phase control bit signal according to phase control pulse, a local oscillator (3) for generating clock pulse, and a digital phase controller (4) for controlling phase of clock pulse generated by the local oscillator