A 20 GHz power amplifier with IM3 distortion cancellation by load-split derivative superposition
Journal
IEEE MTT-S International Microwave Symposium Digest
Journal Volume
2016-August
Journal Volume
2016-August
ISBN (of the container)
978-150900698-4
Date Issued
2016-08-09
Author(s)
Abstract
This paper proposes a load-split derivative superposition (DS) linearization technique applied to a K-band CMOS power amplifier (PA). Conventional DS is usually used to cancel high-order transconductance nonlinearity. However, low input impedance leading to gain degradation limits the application of this technique. In order to solve this problem, a common-drain buffer is used as an input replica to split the extra loading from the auxiliary DS path, which effectively increases the input impedance. The proposed PA demonstrates a superior third-order intermodulation (IM3) distortion cancellation. The sweet-spot of IM3 is close to output 1-dB compression power (OP1dB) without severe small-signal gain degradation.
Subjects
derivative superposition
Intermodulation distortion (IMD)
linearization
power amplifiers (PA)
SDGs
Publisher
Institute of Electrical and Electronics Engineers Inc.
Type
conference paper