ne567f NXP Semiconductors, ne567f Datasheet - Page 7

• Manufacturer Part Number: ne567f
• Description: Tone Decoder/phase-locked Loop
• Manufacturer: NXP Semiconductors

Philips Semiconductors Linear Products
TYPICAL RESPONSE
3. The value of C3 is generally non-critical. C3 sets the band edge
output stage will be delayed until the voltage on C
threshold voltage. (Such delay may be desirable to avoid spurious
outputs due to transient frequencies.) A typical minimum value for
C
4. Optional resistor R2 sets the threshold for the largest “no output”
AVAILABLE OUTPUTS
The primary output is the uncommitted output transistor collector,
Pin 8. When an in-band input signal is present, this transistor
April 15, 1992
3
Tone decoder/phase-locked loop
is 2C
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
input voltage. A value of 130k is used to assure the tested limit
of 10mV
increased sensitivity. The explanation can be found in the
“optional controls” section which follows.
2
.
f
O
RMS
NOTE:
R
NOTES:
S/N = –6dB
R
Noise Bandwidth = 140Hz
+
L
INPUT
Response to 100mV
L
Response to Same Input Tone Burst
= 100
= 100
OUTPUT
OUTPUT
R 1 C 1
min. This resistor can be referenced to ground for
1
INPUT
INPUT
C
R
1
1
With Wideband Noise
Figure 1.
3
5
6
2
(Figure 1)
LOW
PASS
FILTER
C
2
RMS
567
+V
4
7
Tone Burst
1
8
OUTPUT
FILTER
C
3
+V
R
3
2
R
passes the
L
409
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 f
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 -2V
average of +V/2. A 1k load may be driven from pin 5. Pin 6 is an
exponential triangle of 1V
high impedance loads may be
OUTPUT
(PIN 8)
LOW PASS
FILTER
(PIN 2)
Figure 2. Typical Output Response
PIN 1
VOLTAGE
(AVG)
4.0
3.5
3.0
2.5
0.9f
P-P
O
IN-BAND
INPUT
VOLTAGE
0
O
with a slope of about 20mV per percent
f
with an average DC level of +V/2. Only
1
= f
THRESHOLD VOLTAGE
O
100
BE
f
O
) (+V-1.4V) having a DC
V
CE
7%
200mVrms
(SAT) < 1.0V
14%
1.1f
O
NE/SE567
V
Product specification
BW
REF
V+
0
3.9V
3.8V
3.7V