AMAX STEREO
IC CHIPSET
DW SUFFIX
PLASTIC PACKAGE
CASE 751D
(SO–20L)
20
1
Order this document from Analog Marketing
DW SUFFIX
PLASTIC PACKAGE
CASE 751F
(SO–28L)
28
1
20
1
28
1
MC13027
MC13122
P SUFFIX
PLASTIC PACKAGE
CASE 710
P SUFFIX
PLASTIC PACKAGE
CASE 738
1
The MC13027 and MC13122 have been specifically designed for AM
radio which can meet the EIA/NAB AMAX requirements. They are
essentially the same as the MC13022A and MC13025 with the addition of
noise blanking circuitry. The noise blanker consists of a wide band amplifier
with an RF switch for blanking ahead the IF amplifier and a stereo audio
blanker with adjustable delay and blanking times.
Operating Voltage Range of 6.0 V to 10 V
RF Blanker with Built–In Wide Band AGC Amplifier
Audio Noise Blanker with Audio Track and Hold
Mixer Third Order Intercept of 8.0 dBm (115 dB
μ
V)
Wide Band AGC Detector for RF Amplifier
Local Oscillator VCO Divide–by–4 for Better Phase Noise
Buffered Local Oscillator Output at the Fundamental Frequency
Fast Stereo Decoder Lock
Soft Stereo Blend
Signal Quality Detector to Control Variable Q–Notch Filters for Adaptive
Audio Bandwidth and Whistle Reduction
Signal Quality Detector for AM Stereo
Very Low Distortion Envelope and Synchronous Detectors
Variable Bandwidth IF
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC13027DW
TA= –40
TA = –40
to +85
°
°
C
SO–20L
MC13027P
Plastic DIP
MC13122DW
SO–28L
MC13122P
Plastic DIP
Fast
AGC
Control
Audio
Blanking
Functional Block Diagram
Oscillator
Buffer
Voltage
Controlled
Oscillator
Wide Band
AGC
AM
Detector
Automatic
Gain Controlled
RF Amplifier
Pulse
Detector
÷
4
Mixer
IF Amplifier
IF Amplifier
AGC
Shunt
Switch
Pulse Length
Timer
Pulse Delay
Timer
Signal Quality
Detector
Pilot
Detector
Decoder
Track & Hold
Post Detector
Filter
450 kHz IF
Signal Level
450 kHz Blend cos
θ
Fast Lock
Control
Stereo Indicator Lamp
Stop–Sense
RF AGC Meter Drive
Right Audio
Left Audio
Yes/No
I
RF
Blanking
AGC
Output
To Synthesizer
Osc
Tank
AGC
Input
RF
Input
RF Input
L
R
Q
Fast/
Slow
MC13027
MC13122
This device contains 428 active transistors.
This device contains 670 active transistors.
Pulse Length
Timer
This document contains information on a product under development. Motorola reserves the
right to change or discontinue this product without notice.
Motorola, Inc. 1996
Issue 1