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SL1019P Schematic ( PDF Datasheet ) - AUK corp

Teilenummer SL1019P
Beschreibung AM TUNER SYSTEM
Hersteller AUK corp
Logo AUK corp Logo 




Gesamt 10 Seiten
SL1019P Datasheet, Funktion
d
Semiconductor
SL1019P
AM TUNER SYSTEM
Description
The SL1019P is a AM electronic tuner IC with high performance. It is greatly improved
cross modulation characteristics.
Function
RF wide-band AGC, Attenuator Driver, Local OSC with ALC, Local OSC Buffer,
Mixer, IF Amp, IF AGC, Detector, Signal Meter.
Features
Low noise.
VCC variation compensation.
The local OSC buffer output facilitates designing of electronic tuner system, frequency
display and etc.
The narrow band signal meter output is usable as auto search stop signal.
The excellent cross modulation characteristics prevent not only adjacent-channel
interference but also interference caused by all channels with in broadcast band.
The OSC with ALC improves tracking error.
Double balanced differential MIX.
Recommended supply voltage : VCC = 8V
Operating Supply Voltage range : VCC = 7.5V ~ 12V
Application
The AM car radios and the home receivers.
Ordering Information
Type NO.
SL1019P
Marking
SL1019
Package Code
DIP20
Outline Dimensions
unit : mm
10
11
2.54
26.14
0.46
22.84
1
0.89R
7.62
20
7o
0.51
1.52
3.30
7.11
7.62
7o
5o-7o
0.25
KSI-W020-000
1






SL1019P Datasheet, Funktion
Information in using IC(Continued)
CD is 2000pF to 3000pF or there abouts
L2 Damping(600kHz ~ 1400kHz) Reference Circuit: -15dB
Changing Circuit : -4dB
SL1019P
7. The L2 is used to remove the SW band.
If the RF stage is double-tuned, the difference in sensitivity within the RF band almost
disappears. thereby leading to worse spurious characteristic.
8. The SL1019P contains 2-channel wide-band AGC.
The pin 6 detects and undesired signal within the RF band
and wide-band AGC is applied. This detection sensitivity is
determined inside the IC. The pin 2 detects and undesired
signal outside the RF band. This detection sensitivity is
W ide Be n d 2
AFC Input 6
RF AGC 1
W ide
Be n d
AGC
V ref
Signal
16 16Me te r O u tpu t
V cc
R9
Ge
C9
RA
RB
determined by R3. When 1mVrms(f=1MHz) signal is applied
to pin 2, AGC operates.
9. In the AGC circuit of the test circuit the presence of an
A NT Da mp i n g 4
A NT
D a mp i n g
Dr i v e r
R A=4.3K
R B=3.0K
undesired signal of high strength within the receiving band
may cause the desired signal to be suppressed when the
desired signal is low or medium in strength. Shown below is
the circuit configuration where the necessary measures are taken against this
suppression.
10.The circuit shown below is available to stabilize the transient response of the signal
meter output at the search stop mode.
13
R10
R11
17
RF AGC
+
C18
C19
10K
1K
+
Signal during searching
from PLL
11. When using MW, no additional resistor is required
But when using LW(approximately 50or greater), additionally connect a resistor of
27KΩ across pins 18 and 19 against increase in local OSC level.
12. For improvement in image frequency interference change the RF double tuning coil
as follows, and the image frequency interference becomes 63dB at fr = 1400KHz (Q
point of the tuning circuit must not be decreased with tuning resistor 100KΩ )
KSI-W020-000
6

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