The invention belongs to the technical field of
millimeter wave integrated circuits and specifically relates to an injection-locked dichotomous
frequency divider applied in an
integrated circuit of a
transceiver. The injection-locked dichotomous
frequency divider comprises an
inductance and
capacitance oscillator, a tuning circuit and a
signal injection circuit, wherein the tuning circuit is tuned by a varactor, the
inductance and
capacitance oscillator performs self-excited oscillation at certain frequency without external input excitation, and the
signal injection circuit is used for injecting an input
signal into a
resonant cavity of the oscillator for realizing traction and locking of the self-excited frequency of the oscillator, thereby realizing dichotomous frequency division of the input signal. Compared with a traditional injection-locked circuit, an additional matching circuit is eliminated, the
power consumption and the area required for a
chip are significantly reduced, the injection efficiency is improved, and the locking range of the
frequency divider is expanded. By using the forward body bias technology, the circuit can realize wider working frequency under lower
voltage of a power supply, and the circuit can realize differential input.