A TV Receiver Front-End With Linearized LNA and Current-Summing Harmonic Rejection Mixer

作者：Im Donggu; Lee Ockgoo; Nam Ilku^*

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2017, 64(3): 269-273.

DOI：10.1109/TCSII.2016.2560960

• Common gate (CG)
• current mirror
• diodeconnected load
• distortion cancellation
• harmonic rejection mixer (HRM)
• harmonic rejection ratio (HRR)
• noise cancellation
• postlinearization
• tuner

A low-noise and highly linear wideband receiver front-end composed of the linearized low noise amplifier and current-summing harmonic rejection mixer is implemented in a 0.18-mu m CMOS process for TV tuner applications. It shows a measured voltage gain (A(v)) of more than 34.5 dB, a noise figure of less than 3.5 dB, and a third-order input-referred intercept point (IIP3) of more than -20 dBm in the frequency range from 44 to 880 MHz. The baseband coefficient scaling and summation based on the current mirror ensure a third-and fifth-harmonic rejection ratio of over 45 dBc in measurement with high linearity performance. The power consumption of the proposed TV receiver front-end is 16.2 mW at a 1.8-V supply voltage.

• 出版日期2017-3