Novel DC-offset cancellation techniques for even-harmonic direct conversion receivers
| Autor: | B. Matinpour, J. Laskar, Sudipto Chakraborty |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Engineering
Radiation Physics::Instrumentation and Detectors business.industry Local oscillator Electrical engineering Condensed Matter Physics Direct-conversion receiver Homodyne detection Electronic engineering Demodulation Electrical and Electronic Engineering business Mesfet integrated circuits Antiparallel (electronics) Diode DC bias |
| Zdroj: | IEEE Transactions on Microwave Theory and Techniques. 48:2554-2559 |
| ISSN: | 0018-9480 |
| DOI: | 10.1109/22.899012 |
| Popis: | We present two novel dc-offset cancellation techniques for antiparallel diode pair even-harmonic mixers in a direct conversion receiver. Using fundamental equations, we describe the contribution of diode mismatch to dc offset and present an intrinsic mechanism of dc-offset cancellation. Similarly, we describe an extrinsic method of cancellation utilizing the second harmonic of the local oscillator. The cancellation techniques are successfully incorporated in fully monolithic C-band direct conversion receivers and mixers. Measurements confirm the equations and verify complete cancellation using the proposed methods. This works provides a solid foundation for the design and development of fully monolithic and high-performance direct conversion receivers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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