Multi-level mixer architecture for direct conversion of FSK sign

Details Multi-level mixer architecture for direct conversion of FSK sign Multi-level mixer architecture for direct conversion of FSK sign

1996-09-18

2000-01-25

Chin, Stephen

Pulse or digital communications

Receivers

Angle modulation

375335, H03D 300, H04L 2714

Patent

active

060185538

ABSTRACT:
A multi-level quadrature (I/Q) mixer for use in a communication system such as a paging device, where the mixer includes first and second I/Q downconversions followed by demodulation. The first I/Q downconversion converts an I/Q signal pair to a first IF, and the second I/Q downconversion converts an I/Q signal pair to a second IF. The first IF may or may not be the center frequency depending on the number of subchannels in the single channel being downconverted.

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