MC3362 - Motorola

MC3362 LOW-POWER DUAL CONVERSION FM RECEIVER

The MC3362 is a complete FM narrowband receiver from antenna input to audio preamp output. The low voltage dual conversion design yields low power drain, excellent sensitivity and good image rejection in narrowband voice and data link applications. In the typical application (Figure 1), the first mixer amplifies the signal and converts the RF input to 10.7 M.

Features

o 200 MHz 1st Mixer Input 1 2nd LO Output 2 2nd LO Emitter 3 X 24 1st Mixer Input 23 Varicap Control 22 1st LO Tank 21 1st LO Tank X 20 1st LO Output 19 1st Mixer Output 18 2nd Mixer Input 17 2nd Mixer Input 16 VEE 15 Comparator Output 14 Comparator Input X 13 Detector Output Figure 2. Input Match 0.01 VCC 120 pF 1 2 10.245 MHz 50 pF 3 4 Ceramic Filter 455 kHz 5 MC3362 6 7 0.1 0.1 10 k 0.1 8 9 200 k To Carrier Detect Indicator 10 11 12 39 K 24 23 22 21 20 19 18 17 16 15 14 0.001 13 8.2 k Recovered 0.01 Audio 10 k 0.1 Data VCC To PLL or Prescaler Ceramic Filter 10.7 MHz 1.0 + 0.01 0.41 µH From.