TD7624AFN_01 Datasheet, PDF (19/21 Pages) Toshiba Semiconductor – 3-WIRE AND I2C BUS SYSTEM, 1.3 GHz DIRECT TWO MODULUS-TYPE FREQUENCY SYNTHESIZER FOR TV AND CATV

TYPICAL INPUT SENSITIVITY CURVE
TD7624AFN
FILTER COMPONENT EXPRESSION
C1
R1
C2
with
= [Kv _* Icomp/(2π)] / (ωn² _* N)
= [2 _* ε] / (ωn _* C1)
= 1 / (2π _* fc _*R1)
:
Kv = Oscillator control sensitivity (radian / Second / Volts)
Icomp = Charge-pump current (A)
ωn = Natural radian frequency (radian / Second)
N = Total counter ratio
ε
= Dumping-factor (generally : dumping-factor is about 0.5~1.0)
fc = filter cut-off frequency with combination resistor R1.
(generally : fc is about fr (reference frequency) / 20)
2001-03-01 19/21