參數(shù)資料
型號: XR-215A
廠商: Exar Corporation
英文描述: Monolithic Phase Locked Loop
中文描述: 單片鎖相環(huán)
文件頁數(shù): 12/32頁
文件大?。?/td> 331K
代理商: XR-215A
XR-215A
12
Rev. 1.01
VCO Timing Capacitor (Pins 13 and 14)
The VCO free-running frequency, f
o
, is inversely proportional to timing capacitor C
0
connected between pins 13 and 14.
(See Figure 8.)
VCO Output (Pin 15)
The VCO produces approximately a 2.5Vp-p output signal at this pin. The DC output level is approximately 2 volts below
V
CC
. This pin should be connected to pin 9 through a 10k resistor to increase the output current drive capability. For
high voltage operation (V
CC
> 20V), a 20k resistor is recommended. It is also advisable to connect a 500 resistor in
series with this output for short circuit protection.
0.1
1
10
100
1000
Constant = 1V rms
2V/RAD
Low Level Input Input Amplitude (mV rms)
1.0
0.1
0.01
Figure 9. Phase Comparator Conversion Gain, K
d
, versus Input Amplitude
Pd
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