HCTL-2001 Datasheet, PDF (8/12 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 6. Simplified Digital Noise Filter Logic
3 t _CLK
CLK
CHA
t_E
t_E
t_ES
t_ES
t_ES
t_ES
CHB
Noise Spike
CHA
filtered
t_E
t_E
CHB
filtered
CHI
filtered
Figure 7. Signal Propagation through Digital Noise Filter
JQ
CK
K
CHA
filtered
JQ
CK
K
CHB
filtered
8