MC3359 Datasheet (Motorola) - HIGH GAIN LOW POWER FM IF

MC3359, HIGH GAIN LOW POWER FM IF

The MC3359 is a low *power FM IF circuit designed primarily for use in voice *communication scanning receivers.

It is also finding a place in narrowband data links.

In the typical application (Figure 1), the mixer *oscillator combination converts the input frequency (10.7 MHz) d

Order this document by MC3359/D Low Power Narrowband FM IF .

includes oscillator, mixer, limiting amplifier, AFC, quadrature discriminator, op/amp, squelch, scan control, and mute switch.

The MC3359 is designed to detect narrowband FM signals using a 455 kHz ceramic filter for use in FM dual conversion communications equipment.

The MC3359 is similar to the MC3357 except that the MC3359 has an additional limiting IF stage, an AFC output, and an opposite polarity Broadcast Detector.

The MC335

MC3359 Features

* e desired audio frequencies. This “noise band” is monitored by an active filter and a detector. A squelch

* trigger circuit indicates the presence of noise (or a tone) by an output which can be used to control scanning. At the same time, an internal switch is operated which can be used to mute