Design and Implementation of a CMOS Tunable Phase Shifter

A. Mohammadi, A. Ayatollahi, A. Abrishamifar

Research output: Contribution to journalArticlepeer-review


A tunable phase shifter for high frequency applications is proposed. The idea is inspired from the current mirror operation principle. Exploiting the current mode
approach extends the operation frequency of the phase-shifter up to the transistor cut-off frequency. The performance of the proposed circuit was verified via experimental results at low frequencies with the available off-the-shelf components. The prototype was implemented by CMOS (Complementary Metal Oxide Semiconductor) gates on a chip (CD4002). The simulated power consumption of the circuit implemented in 0.18um TSMC CMOS technology is 80 microwatts which covers a wide frequency range. The elimination of inductor, loss-less inputoutput characteristic and accurate phase change are the notable
features of the circuit addressed in this work.
Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Selected Areas in Microelectronics (JSAM)
Issue numberOctober
Publication statusPublished - 31 Oct 2011


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