AN1993_15 Datasheet, PDF (1/23 Pages) NXP Semiconductors – High sensitivity applications of low-power RF/IF integrated circuits

AN1993
High sensitivity applications of low-power RF/IF integrated
circuits
Rev. 3 — 13 August 2014
Application note
Document information
Info
Content
Keywords
12 dB SINAD, 20 dB SINAD, crystal filter, ceramic filter, VHF, UHF,
image frequency, FM broadcast receiver, ASK, FSK
Abstract
This application note discusses four high sensitivity receivers and
Intermediate Frequency (IF) strips that utilize intermediate frequencies of
10.7 MHz or greater. Each circuit utilizes a low-power VHF mixer and
high-performance low-power IF strip. The circuit configurations are:
45 MHz or 49 MHz to 10.7 MHz narrowband; 90 MHz to 21.4 MHz
narrowband; 100 MHz to 10.7 MHz wideband; and 152.2 MHz to
10.7 MHz narrowband.
Each circuit is presented with an explanation of component selection
criteria (to permit adaptation to other frequencies and bandwidths).
Optional configurations for local oscillators and data demodulators are
summarized.