Functions:
FM IF Amplifier
Quadrature Detector
Audio Amplifier
Muting Circuit
Signal–Meter Driver
AFC
Center–Meter Driver
Muting Controller (Bandwidth & Level)
Center–Meter Short Circuit for AM Band (Pin15)
IF Amp Killer for AM Band (Pin15)

FEATUREs:
High Signal–to–Noise Ratio
High Sensitivity
Large Muting Attenuation
Stable Operation using Full–Balanced Differential
Triplex Amplifier
High Linearity of Signal Meter
Operational Input Level of Muting is Adjustable by Controlling External Resistance