Low Flicker Noise, Odd-Phase Master LO Active Mixer Using a Low Switching Frequency Scheme

Author

Dongju Lee ; Minjae Lee

Author_Institution

Sch. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea

Volume

50

Issue

10

fYear

2015

Firstpage

2281

Lastpage

2293

Abstract

This paper presents a new type of flicker noise and mismatch up-converting active mixer with odd cascode switching pairs that require lower switching frequencies. This requirement relaxes the local oscillator (LO) switching speed, which mitigates the effect of flicker noise and IM2 due to parasitic capacitances. A frequency-scalable LO generator is designed to eliminate delay adjustments between the slave LO and master LO signals for multiband operations, and a high crossing master LO driving scheme is also presented for IIP3 improvement for low supply operations. Fabricated using a 0.11 μm CMOS process at a 1.2 V supply, the proposed mixer achieves <; 4 kHz flicker noise corner, 9.4 dBm IIP3 with a 7.2 dB conversion gain, and> 60 dBm IIP2 at an effective LO frequency of 1.8 GHz.

Keywords

CMOS integrated circuits; flicker noise; mixers (circuits); oscillators; CMOS process; delay adjustments; flicker noise; frequency 1.8 GHz; frequency-scalable LO generator; gain 7.2 dB; local oscillator; low switching frequency scheme; mismatch up-converting active mixer; multiband operations; odd cascode switching pairs; odd-phase master LO active mixer; parasitic capacitances; size 0.11 mum; switching frequencies; switching speed; voltage 1.2 V; 1f noise; Baseband; Mixers; Switches; Switching frequency; Topology; Active mixer; CMOS; IIP2; IIP3; LO gating; direct conversion; flicker noise; image rejection; linearity; mismatch; multiband; receiver; second-order distortion; self-mixing;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2015.2449556

Filename

7155602