A 60‐GHz CMOS Down‐Conversion Mixer with Current‐Reused RF Single‐to‐Differential Converter and Integrated Marchand Balun

Abstract

A 60-GHz double-balanced mixer for direct down-conversion using standard 90-nm CMOS technology is reported. The down- conversion mixer comprises a double-balanced Gilbert cell with a current-reused RF single-to-differential converter for conversion gain (CG) enhancement, a Marchand balun for converting the single LO input signal to differential signal, and a baseband amplifier. The mixer consumes 17 mW and achieves low noise figure of 12.8 dB at 60 GHz. In addition, the mixer achieves excellent LO-RF isolation of 64.7 dB, LO-IF isolation of 51.5 dB, and RF-IF isolation of 59.5 dB at RF of 60 GHz and LO of 59.9 GHz. At IF of 0.1 GHz, the mixer achieves maximum CG of 15.46 dB at RF of 62 GHz, and CG of 14.7 dB at RF of 60 GHz, one of the best CG results ever reported for a 60-GHz CMOS down-conversion mixer. The corresponding 3-dB bandwidth of RF is 5.4 GHz (58.7-64.1 GHz). These results demonstrate the proposed down-conversion mixer architecture is very promising for 60-GHz direct-conversion transceiver applications.

Forty five nm CMOS low power multilevel active feedback transimpedance amplifier for optical receivers

“…It helped to resolve the trade-offs between the significant parameters of TIA such as gain bandwidth and impedance. With each development in circuit design, various constraints were identified such as chip area, power dissipation and supply voltage noise reduction (Lee and Lin, 2013). Thus, a new complementary metal oxide semiconductor (CMOS) technology is introduced to deal with the new era problems in very large scale integrated circuit (VLSI) design.…”

A down‐conversion mixer using 90‐nm CMOS process for 60‐Ghz applications

“…The mixer that performs frequency conversion is an essential component in the RF front end. Mixers for 60 GHz systems can be realized by passive mixers or active mixers . The passive mixers do not consume power and have better linearity performance but they suffer from the drawback of no gain.…”

“…The passive mixers do not consume power and have better linearity performance but they suffer from the drawback of no gain. Gilbert cell architectures and gate‐pumped mixers are in the category of active mixers to provide conversion gains (CGs). Although the Gilbert cell is the most common topology for mixer design, the CG may be limited by the loss via the parasitic capacitance between the transconductance ( G m ) stage and the switch stage and by the operation speed of the switch devices.…”