SE567D Просмотр технического описания (PDF) - Philips Electronics
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SE567D Datasheet PDF : 13 Pages
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Philips Semiconductors Linear Products
Tone decoder/phase-locked loop
Product specification
NE/SE567
TYPICAL RESPONSE
INPUT
OUTPUT
NOTE:
RL = 100Ω
Response to 100mVRMS Tone Burst
OUTPUT
INPUT
NOTES:
S/N = –6dB
RL = 100Ω
Noise Bandwidth = 140Hz
Response to Same Input Tone Burst
With Wideband Noise
3. The value of C3 is generally non-critical. C3 sets the band edge
of a low-pass filter which attenuates frequencies outside the
detection band to eliminate spurious outputs. If C3 is too small,
frequencies just outside the detection band will switch the output
stage on and off at the beat frequency, or the output may pulse
on and off during the turn-on transient. If C3 is too large, turn-on
and turn-off of the
+V
+V
INPUT
fO
+
1 R1
R1C1
C1
3
4
5
567
6
2
7
C2
LOW
PASS
FILTER
Figure 1.
RL
8
R2
1
C3
OUTPUT
FILTER
output stage will be delayed until the voltage on C3 passes the
threshold voltage. (Such delay may be desirable to avoid spurious
outputs due to transient frequencies.) A typical minimum value for
C3 is 2C2.
4. Optional resistor R2 sets the threshold for the largest “no output”
input voltage. A value of 130kΩ is used to assure the tested limit
of 10mVRMS min. This resistor can be referenced to ground for
increased sensitivity. The explanation can be found in the
“optional controls” section which follows.
AVAILABLE OUTPUTS (Figure 1)
The primary output is the uncommitted output transistor collector,
Pin 8. When an in-band input signal is present, this transistor
saturates; its collector voltage being less than 1.0 volt (typically
0.6V) at full output current (100mA). The voltage at Pin 2 is the
phase detector output which is a linear function of frequency over
the range of 0.95 to 1.05 fO with a slope of about 20mV per percent
of frequency deviation. The average voltage at Pin 1 is, during lock,
a function of the in-band input amplitude in accordance with the
transfer characteristic given. Pin 5 is the controlled oscillator square
wave output of magnitude (+V -2VBE)≅(+V-1.4V) having a DC
average of +V/2. A 1kΩ load may be driven from pin 5. Pin 6 is an
exponential triangle of 1VP-P with an average DC level of +V/2. Only
high impedance loads may be
OUTPUT
(PIN 8)
LOW PASS
FILTER
(PIN 2)
V+
7% 14% BW
0
VCE (SAT) < 1.0V
3.9V
3.8V
3.7V
0.9fO
fO
1.1fO
PIN 1
VOLTAGE
(AVG) 4.0
3.5
VREF
THRESHOLD VOLTAGE
3.0
f1 = fO
2.5
0
100
IN-BAND
INPUT
VOLTAGE
200mVrms
Figure 2. Typical Output Response
April 15, 1992
409
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