3848
DUAL-CONVERSION AM RECEIVER
3848
Providing the AM signal processing functions for an electronically tuned AM receiver (ETR), the A3848EEQ includes two balanced mixers, a crystal local oscillator, an L/C-tuned local oscillator, oscillator buffer, IF amplifier, AM detector, scan control detectors, and a switchable voltage
regulator.
This dual-conversion device typically mixes the incoming RF up to a first IF of 10.
7 MHz, then down to 450 kHz, and then detects the audio.
The addition of a JFET matched to a whip antenna, RF low-pass filter, IF selectivity, and audio stages gives a complete AM radio which can be used in automotive receivers.
The frequency-detecting stop circuit is also cap...