CXA3106Q
Next, the various parameters inside an actual CXA3106Q are obtained.
The CXA3106Q's charge pump output block and the LPF circuit are as follows.
C2
R1 C1
46
45
CXA3106Q
To VCO
VCC
100k
100µA
or 400µA
or 1600µA
S1
S2
100µA
or 400µA
or 1600µA
20k
100
First, KPD is as follows.
KPD = 100µ/2π or 400µ/2π or 1600µ/2 π (A/rad)
Typical KVCO characteristics curves for the CXA3106Q's internal VCO are as follows.
VCO DIV = 1/1
120
VCO DIV = 1/2
VCO DIV = 1/4
80
40
2
3
4
VCO input voltage [V]
Therefore, KVCO is as follows.
KVCO = 2π · 50M or 2π · 25M or 2π · 12.5M (rad/s/V)
– 29 –
SONY [ SONY CORPORATION ]
