High-Frequency Waveform Generator
EXTERNAL
OSC INPUT
÷N
PHASE DETECTOR
CENTER
FREQUENCY
+5V -5V
C1
1µF
C2
1µF
14 16 17 20 4
SYNC DV+ V+
1 REF
V- A1 3
A0
R2
CW
R3
7 DADJ MAX038
10
R1
19 50Ω
R4
IIN
OUT
8
FADJ
R5
OFFSET
-5V
R6
GAIN
5 COSC
13
PDI
12
PDO
C4
C3
CAPTURE FREQUENCY
GND GND GND GND GND DGND
2 6 9 11 18 15
Figure 4. Phase-Locked Loop Using External Phase Detector
RF
OUTPUT
EXTERNAL
OSC INPUT
÷N
FREQUENCY PHASE DETECTOR
CENTER
FREQUENCY
+5V -5V
C1
1µF
C2
1µF
14 16 17 20 4
SYNC DV+ V+
1 REF
V- A1 3
A0
R2
CW
R3
7 DADJ MAX038
10
R1
19 50Ω
R4
IIN
OUT
8
FADJ
R5
OFFSET
-5V
R6
GAIN
5 COSC
13
PDI
12
PDO
C4
C3
CAPTURE FREQUENCY
GND GND GND GND GND DGND
2 6 9 11 18 15
RF
OUTPUT
Figure 5. Phase-Locked Loop Using External Frequency Phase Detector
14 ______________________________________________________________________________________