Back to Search
Start Over
A 76–84 GHz CMOS $4\times$ Subharmonic Mixer With Internal Phase Correction.
- Source :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers; Jul2018, Vol. 65 Issue 7, p2083-2096, 14p
- Publication Year :
- 2018
-
Abstract
- A CMOS $4\times $ subharmonic mixer (SHM) with an internal phase error correction mechanism operating at mm-wave frequencies is proposed in this paper. The SHM operates with a 81-GHz RF input signal and a 20-GHz local oscillator (LO) signal to produce a 1-GHz output. The single ended input is converted into octet-phase, through an active input balun, an active polyphase filter, and certain phase adders. A phase calibration technique is employed, to compensate the phase deviations due to the circuit mismatches, offering a ±5° phase adjustment between the generated phase shifts. By this technique, a close to optimal performance can be obtained, especially in terms of conversion gain and LO-IF isolation, which can be improved by 1.5 to 7.5 dB and by 5 to 17 dB, respectively. Fabricated in a 65-nm CMOS low-power technology, the prototype exhibits a conversion gain of −8 dB (without using an IF amplifier), a 1 dB compression point ( $\text{P}_{\mathrm {1dB}}$ ) of −10 dBm, a third-order intercept point (IIP3) of 1 dBm, and a noise figure of 15 dB. The power consumption is 213 mW, and port-to-port isolation is >70 dB. The achieved performance compares well with the state of the art at these high frequencies despite the use of a slower CMOS process. [ABSTRACT FROM AUTHOR]
- Subjects :
- SUBHARMONIC functions
ELECTRIC potential
Subjects
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 65
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 129914947
- Full Text :
- https://doi.org/10.1109/TCSI.2017.2785119