MC3372 - Low Power Narrowband FM IF
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz.
ML3371 at f RF = 10.7 MHz (see Figure 11).
Pin 1 Symbol OSC1 Internal Equivalent Circuit Description The base of the Colpitts oscillator.
Use a high impedance and low capacitance probe or a “sniffer” to view the wave<
ML3371 ML3372 Low Power Narrowband FM IF Legacy Device: Motorola MC3371, MC3372 The ML3371 and ML3372 perform single conversion FM reception and consist of an oscillator, mixer, limiting IF amplifier, quadrature discriminator, active filter, squelch switch, and meter drive circuitry.
These devices are designed for use in FM dual conversion communication equipment.
The ML3371/ML3372 are similar to the Motorola MC3361/MC3357 FM IFs, except that a signal strength indicator replaces the scan functio
MC3372 Features
* ttenuated by the filter. The typical level is approximately 50 mVpp. 6 7 DEC1 DEC2 DEC2 IF Decoupling. External 0.1 µF capacitors connected to VCC. 8 Quad Coil 8 Quad Coil VCC Quadrature Tuning Coil. Composite (not yet demodulated) 455 kHz IF signal is present. The typical level is 500 mVpp.
