LAPIS Semiconductor ML7406, Hardware Design Manual, Page: 13 / 24

ML7406 Family LSIs Hardware Design Manual
FEXL7406DG-01
7
4. VCO
Figure 4.1 shows a configuration example of the VCO tank circuit. VCO oscillator frequency calculated as
follows:
LC
F

2
1

The L in the above equation will be the sum of the inductor L1, the line inductance of the PCB and the internal
inductance of the ML7406. And the C will be the sum of the capacitor C1, the line capacitor of the PCB and the
internal capacitor (including calibration capacitor) of the ML7406.
Figure 4.1 VCO tank circuit configurations
IND1(#28)
Variable capacitor
Amplifier
C1
L1
IND2(#30)
Variable capacitor
for calibration