MULTI-PHASE OSCILLATOR

摘要

A multi-phase oscillator includes: a plurality of ring oscillators (21) each having a plurality of output ports and each formed by an odd number of inverters (20) connected in a ring; shape; and a plurality of resistance elements (30) for connecting the output ports of the ring oscillators (21) so that all the ring oscillators (21) operate with the same frequency and operate while maintaining a desired phase relationship. The number of ring oscillators (21) is not limited to an odd number but may be an even number. By using the resistance elements (30) as the phase connection elements, the state of the phase connection destination may be changed into the direction matched with the state of the phase connection source. When resistors are used as the resistance elements (30), the phase output accuracy is significantly increased and it is possible to obtain a high-frequency oscillation.