RECEIVER ARCHITECTURE FOR A COMPACT AND LOW POWER RECEIVER

摘要

A circuit for a receiver with reconfigurable low-power or wideband operation may comprise one or more main signal paths each coupled to a first port and including a low-noise amplifier (LNA) configured to provide a radio frequency (RF) signal to a main mixer circuit. An auxiliary signal path may be coupled to a second port. The auxiliary signal path may include an auxiliary mixer configured to provide an on-chip matching input impedance that may match an impedance of the antenna. The first port may be coupled to an RF antenna through an off-chip matching circuit, when a low-power operation is desired. The first port may be coupled to the second port and to the RF antenna, when a wideband operation is desired.

主权项

1. A circuit for a compact and low power receiver, the circuit comprising:
a low-power low-noise amplifier (LNA) configured to amplify radio-frequency (RF) signals received from an RF antenna; and a quadrature mixer coupled to a first and a second trans-impedance amplifiers (TIAs), wherein:
input and output nodes of the first and the second TIAs are cross-coupled via a first and a second resistor, andthe cross coupling is configured to create a complex impedance that replaces one or more LNA load inductors corresponding to one or more frequency bands of the receiver.