XR-2212_06 Datasheet, PDF (5/20 Pages) Exar Corporation – Precision Phase-Locked Loop

XR-2212
Signal
Input
0-DET
Input
VCO
Voltage
Output
VCO
Current
Output
Pre
Amp
Phase
Detector
AMP
Loop
Filter
VCO
+
-
Op Amp
Phase
Quadrature
Output
Figure 2. Functional Block Diagram of XR-2212 Precision PLL System
2
0.1mF
Input
Signal
0.1mF
%N
External
Divider
(Optional)
Phase
Detector
16
10
C₁
9
7
ÁÁÁÁ_RF
R_C
R₃
11
0.1mF
R₁
5
12
VCO
14
13
R₀
C_O
V_CC
6
R_L
5.6K
8
C_O
Demod
Output
Internal
Reference
Rev. 2.10
Figure 3. Generalized Circuit Connection for FM Detection, Signal
Tracking or Frequency Synthesis
5