INJECTION-LOCKED FREQUENCY DIVIDER USING RADIO FREQUENCY NEGATIVE RESISTANCE TANK AND TRANSFORMER FEEDBACK

摘要

According to a first embodiment of the present invention, an injection-locked frequency divider comprises: a transformer having first and second coil ends connected by mutual inductance; a pair of cross-linked transistors having a drain connected to the first coil end of the transformer, a source connected to the ground, and cross-linked with each other; a pair of feedback transistors having a drain connected to the second coil end of the transformer, a gate connected to a gate of the cross-linked transistors, a source connected to the ground, and an output end formed in the drain; a pair of negative resistance transistor having a drain connected to power (VDD) and a source connected to the first coil end of the transformer, lowering the inductance of the transformer, and providing negative resistance to satisfy a resonance condition; an inductor connected between the gate of the negative resistance transistors; and an input transistor connected between the gate of the one pair of negative resistance transistors, connected to the inductor in parallel, and receiving an input signal in the gate. According to the present invention, an injection-locked frequency divider using a radio frequency (RF) negative resistance tank and a transformer feedback provides an advantageous effect that the same may be operated in a high frequency.;COPYRIGHT KIPO 2016