HCTL-2001-A00 Datasheet, PDF (9/16 Pages) AVAGO TECHNOLOGIES LIMITED – Quadrature Decoder/Counter Interface ICs

CHA
CK
D
Q
D
Q
D
Q
D
Q
CHB
D
Q
D
Q
D
Q
D
Q
CK
Figure 7. Simplified Digital Noise Filter Logic
3 t _CLK
CLK
CHA
t_E
CHB
Noise Spike
CHA
filtered
CHB
filtered
CHI
filtered
t_E
t_ES
t_ES
t_ES
t_ES
t_E
t_E
Figure 8. Signal Propagation through Digital Noise Filter
J
Q
CK
K
CHA
filtered
J
Q
CK
K
CHB
filtered
9