High-IF superheterodyne receiver incorporating high-Q complex band pass filter

Patent metadata

Field	Value
Publication number	US-9014653-B2
Application number	US-201314027849-A
Country	US
Kind code	B2
Filing date	Sep 16, 2013
Priority date	Sep 16, 2012
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

A novel and useful reconfigurable superheterodyne receiver that employs a 3 rd order complex IQ charge-sharing band-pass filter (BPF) for image rejection and 1 st order feedback based RF BPF for channel selection filtering. The operating RF input frequency of the receiver is 500 MHz to 1.2 GHz with a varying high IF range of 33 to 80 MHz. The gain stages are inverter based g m stages and the total gain of the receiver is 35 dB and in-band IIP3 at mid gain is +10 dBm. The NF of the receiver is 6.7 dB which is acceptable for the receiver without an LNA. The architecture is highly reconfigurable and follows the technology scaling.

First claim

What is claimed is:

1. A superheterodyne radio frequency (RF) receiver, comprising:
an RF input node for receiving an RF input signal;
a local oscillator (LO) input node for receiving an LO signal;
a mixer coupled to said RF input node and said LO input node, said mixer operative to frequency translate said RF input signal in accordance with said LO signal, said mixer producing an in-phase/quadrature (I/Q) intermediate frequency (IF) signal of frequency substantially higher th…

Assignees

• Univ Delft Tech

Inventors

• Madadi Iman
• Tohidian Massoud
• Staszewski Robert Bogdan

Classifications

• H04B1/26

  Electricity · mapped topic

• H03B7/06

  Electricity · mapped topic

• H04B1/10

  Electricity · mapped topic

• H03L7/00 Primary

  Electricity · mapped topic

• H03B5/1228 Primary

  Electricity · mapped topic