77 GHz signal generator with CMOS technology for automotive radar application

The 77 GHz signal generator for an automotive radar application is presented. The circuit designed and fabricated using 65 nm CMOS technology. A 77 GHz signal is generated by the 38.5 GHz VCO and the frequency multiplier. Also, the signal generator with frequency dividers offers a 2.4GHz signal for external PLL lock. In order to obtain the target frequency against the PVT variation, a wideband VCO is designed with 2 bits capacitor array bank. And 2 stage injection locked dividers are designed with same oscillation core circuits except the inductor. The simulated signal generated output has output power of -5 dBm, current consumption of 100 mA and phase noise of -85 dBc/Hz at 1MHz offset frequency.