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CS4101 Datasheet, PDF (6/8 Pages) Cherry Semiconductor Corporation – Precision Air-Core Tach/Speedo Driver with Separate Function Generator Input | |||
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Circuit Description and Application Notes: continued
FREQIN
VREG
R3
SQOUT
VC(t)
+Ã
CT R4
+
Ã
QSQUARE
3.4V
0.25V
CP+
Q1
2.0V
Q3 CPÃ
Q2
+
Ã
RT
F/VOUT
F to V
C4
Figure 5A: Partial Schematic of Input and Charge Pump
PW
VCC
FREQIN 0
SQOUT
0
VREG
ICP+
VCP+
0
T
T-PW
Figure 5B: Timing Diagram of FREQIN and ICP
6
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