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Note:
The formulas are derived from a Worksheet (Lotus 1-2-3) by Phillips™. It is highly recommended that you build a prototype to verify the results !

www.changpuak.ch\ electronics\ calc_03.php - December 09 2011 21:04:08

74HC/HCT4046A : VCO Calculator

A Supply Voltage of 5 V is assumed. Changes affects the Frequencies !

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R1 [kΩ]	3 kΩ < R1 < 300 kΩ
R2 [kΩ]	3 kΩ < R2 < 300 kΩ
C1 [pF]	40 pF < C
FREQ.MIN [kHz]	V_TUN= 1.1 V
FREQ.TYP [kHz]	V_TUN= 2.5 V
FREQ.MAX [kHz]	V_TUN= 3.9 V
K_VCO	kHz/V

74HC/HCT4046A : VCO Calculator

R1 [kΩ]

3 kΩ < R1 < 300 kΩ

R2 [kΩ]

3 kΩ < R2 < 300 kΩ

C1 [pF]

40 pF < C

FREQ.MIN [kHz]

VTUN = 1.1 V

FREQ.TYP [kHz]

VTUN = 2.5 V

FREQ.MAX [kHz]

VTUN = 3.9 V

KVCO

kHz/V

A Supply Voltage of 5 V is assumed. Changes affects the Frequencies !

Share your thoughts.

This is not suiteable to contact the author. Use the "email" function instead.

V_TUN= 1.1 V

V_TUN= 2.5 V

V_TUN= 3.9 V

K_VCO