High-Gain, Low-Power, and Low-Noise CMOS Mixer Using Current-Reused Bleeding Amplification

This letter presents a 2.4-GHz high-gain, low-power, and low-noise complementary metal-oxide-semiconductor (CMOS) mixer using a current-reused bleeding amplifier. To reduce flicker noise, a resonant inductor and a current bleeding circuit are conventionally adopted, which also increases the conversion gain. In this letter, the conventional current bleeding circuit is modified to a current-reused bleeding amplifier to further increase the conversion gain, which also further decreases noise while consuming the same current, compared to the conventional circuit. Measurement results show a conversion gain of 14.64 dB, a noise figure of 9.17 dB at 10 kHz and 7.23 dB at 100 MHz, and an input third-order intercept point (IIP3) of −15.89 dBm. The proposed mixer has a power consumption of 3.82 mW from a 1.5-V supply voltage. It was fabricated by using a 65-nm CMOS process.