RF gain control in direct conversion receivers

This paper presents a study of LO selfmixing and RF gain control issues in direct conversion receivers. In cellular systems, that use continuous time frequency duplexing, these can constitute serious problems. The presented topic is of special importance when digitally programmable gain is implemented at the RF frequencies before the downconversion mixers, practically in the LNA. Furthermore, this paper gives circuit solutions to overcome this problem.

• Type: Conference
• Year: 2002
• Where: ISCAS
• Authors: Jussi Ryynänen, Kalle Kivekäs, Jarkko Jussila, A. Parssinen, Kari Halonen
• Keywords: Continuous Time Frequency, Direct Conversion Receivers, Hardware, ISCAS 2002, RF Gain Control