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实现了一个基于注入锁定技术的射频低功耗正交本振信号产生电路。该电路由工作于两倍频频段的压控振荡器和两个注入锁定二分频器及缓冲器构成,可以为无线收发机提供正交本振信号。通过采用数字调谐技术,压控振荡器达到了很宽的调谐范围,而通过在注入锁定二分频器中加入与压控振荡器相同的变容管和电容阵列,保证了注入锁定二分频器在整个频带范围内都能保持锁定。该正交本振产生电路采用UMC 0.18μm CMOS工艺实现。测试结果表明,在1.9~2.3 GHz频率范围内,该电路能够提供正交本振信号。该电路采用1.8 V电源供电,消耗的电流为2.2 mA(不包含缓冲器的电流),占用芯片面积为1.56 mm2。
An RF low-power quadrature local oscillator signal generation circuit based on injection-locked technology is realized. The circuit consists of a voltage-controlled oscillator operating at twice the frequency band and two injection-locked divide-by-two dividers and buffers that provide orthogonal transceiver signals for the transceiver. By using digital tuning techniques, voltage-controlled oscillators achieve a wide tuning range and injection-locked two-way frequency is guaranteed by adding the same varactor and capacitor array to the voltage-controlled oscillator in the injection-locked divider The device remains locked across the entire frequency band. The orthogonal local oscillator circuit using UMC 0.18μm CMOS technology. Test results show that in the frequency range of 1.9 ~ 2.3 GHz, the circuit can provide orthogonal local oscillator signal. The circuit operates from a 1.8 V supply and draws 2.2 mA (excluding buffer current) consuming 1.56 mm2 of chip area.