A PVT-robust current-mode passive mixer with source-degenerated transconductance amplifier

Author

Li, Shaorui ; Huang, Deping ; Chen, Jinghong

Author_Institution

Brookhaven Nat. Lab., Upton, NY, USA

fYear

2012

fDate

20-23 May 2012

Firstpage

2381

Lastpage

2384

Abstract

A current-mode passive mixer with conversion gain that is robust to process, supply voltage, and temperature (PVT) variations is presented. The passive mixer includes a transconductance amplifier having a source degeneration capacitor. The conversion gain of the current-mode passive mixer is proportional to the ratio of the source degeneration capacitance C_S to the load capacitance C_L. This technique eliminates the need for extra PVT compensation circuitry. Moreover, the conversion gain of the mixer can be designed to be programmable without relying on any gain detecting circuitry. A test chip fabricated in a 90-nm CMOS process demonstrates the PVT-robustness of the proposed mixer.

Keywords

CMOS analogue integrated circuits; current-mode circuits; mixers (circuits); operational amplifiers; passive networks; CMOS process; current mode passive mixer; process variation; size 90 mum; source degenerated transconductance amplifier; source degeneration capacitor; supply voltage variation; temperature variation; Calibration; Capacitance; Capacitors; Current measurement; Gain; Mixers; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Conference_Location

Seoul

ISSN

0271-4302

Print_ISBN

978-1-4673-0218-0

Type

conf

DOI

10.1109/ISCAS.2012.6271776

Filename

6271776