VARIABLE FREQUENCY MULTI-PHASE OSCILLATOR

PROBLEM TO BE SOLVED: To provide a variable frequency multi-phase oscillator having multi-phase outputs embedded in an integrated circuit with simple duty cycle control, large frequency range, simple frequency adjustment configuration and low power dissipation without adding to the complexity of the integrated circuit. SOLUTION: The variable frequency multi-phase oscillator for providing multi-phase signals is disclosed. The variable frequency multi-phase oscillator includes a correlator, a plurality of delay cells, and a NOR circuit. Each delay cell includes a current supply, a capacitor, a comparator, a switch, and a logic unit. The plurality of delay cells generate the multi-phase signals that are phase correlated with a large frequency range. The frequency and duty cycles of the multi-phase signals are adjustable. COPYRIGHT: (C)2008,JPO&INPIT