한국정보통신설비학회:학술대회논문집
- 2009.08a
- /
- Pages.305-308
- /
- 2009
A Design of Low Frequency Noise Figure Improvement of RF Circuit for Direct Conversion Receiver
직접 변환 방식의 저주파 잡음 특성 개선을 위한 RF 전치부 설계 연구
Abstract
This paper presents the design and analysis of RF Front End for Wireless Heartbeat measurement System. In this work LNA, an inductor connected at the gate of the cascode transistor and capacitive cross-coupling are strategically combined to reduce the noise and the nonlinearity influences of the cascode transistors in a differential LNA. The Mixer is implemented by using the Gilbert-type configuration, cross pmos injection technique and the resonating technique for the tail capacitance. The resulting LNA achieves 1.26 dB NF, better than 1.88dB NF Typical Also Mixer resulting achieves 9.8dB at 100KHz.