A CMOS amplifier employing the frequency selective feedback technique using a shunt feedback capacitor is designed and measured. The proposed amplifier can achieve a high IIP3 (input referred third-order intercept point) by reducing the third- and second-order nonlinearity contributions to the IMD3 (third-order intermodulation distortion), which is accomplished using a capacitor as the frequency selective element. Also, the shunt feedback capacitor improves the noise performance of the amplifier. By applying the technique to a cascode LNA using 0.18-μm CMOS technology, we obtain the NF of 0.7 dB, an IIP3 of +8.2 dBm, and a gain of 15.1 dB at 14.4 mW of power consumption at 900 MHz.
|Number of pages||17|
|Journal||International Journal of Circuit Theory and Applications|
|Publication status||Published - 2016 Jan 1|
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MSIP) (2012R1A1A2044158).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics