INTEGRATED 19KHz SC NOTCH FILTER FOR PILOT CANCELLATION ON CHIP FILTER FOR PILOT DETECTOR AND PLL ADJUSTMENT FREE VOLTAGE CONTROLLED OSCILLATOR AUTOMATIC PILOT DEPENDENT MONO/ STEREO SWITCHING NOISE BLANKING WITH PROGRAMMABLE THRESHOLD HIGH CUT CONTROL AND STEREO BLEND INTEGRATED HIGH PASS FILTER FOR INTERFERENCE DETECTOR LEVEL INPUT FOR ADDITIONAL SPIKE DETECTION ON FIELDSTRENGHT SIGNAL VERY HIGH SUPPRESSION OF HARMONIC AND INTERFERENCE SIGNALS DESCRIPTION The is a new concept of monolithic integrated stereo decoder with noise blanking for FM car radio applications. With the used BICMOS technique, the 19KHz Notch Filter, the PLL Filter and Phase Filter is rePIN CONNECTION (Top view)
alized on the chip with a Switched Capacitor concept. Avoiding the use of multipliers and non linear circuits a very high performance in terms of noise suppression and total harmonic distortion is reached.
Symbol VCC ICC Tstg Tamb DC Supply Voltage Supply Current Storage temperature Operating ambient temperature Parameter Value to 85 Unit mA °C
Symbol Rthj-pins Description Thermal resistance junction-pins Typ DIP 20 200 Unit °C/W
ELECTRICAL CHARACTERISTICS (VCC = 9V; modulation frequency: 1KHz; de-emphasis time: = 50µs; nominal MPX input voltage: VMPX 100% (75KHz deviation, fmod = 1KHz); RIN = 40.2k, ROUT = 40.2k; Tamb = 27°C; CREF = 4.7µF; unless otherwise specified)
Symbol VCC ICC VIN VORMS SVRR VL/VR Vo/Vi RO VO THD S+N N M VDC Parameter Supply Voltage Supply Current MPX Input Level (peak to peak) A.F. Output Voltage (mono) Supply Voltage Ripple Rejection Difference of Output Voltage Levels Gain Output Resistance DC Output Voltage Channel Separation Total Harmonic distortion Signal plus noise to noise ratio Muting Attenuation Mute DC Steps at pins 10, 11 Test Condition Min. 7.5 5 Typ. Max. 10.2 15 Unit dB mV
VINTH VPI IPI V19 Pilot Threshold Voltage Pilot Threshold Voltage Pilot Indicator Saturation Voltage Pilot Indicator Leakage Current Control Voltage for forced mono for stereo "ON" for stereo "OFF" < 3dB mVRMS µA V
V16-17 Control Voltage for Channel Separation Control Voltage for Channel Separation = 3.6V (note mV 3/11