Max5406 audio processor with pushbutton interface – Rainbow Electronics MAX5406 User Manual
Page 20
MAX5406
Audio Processor with Pushbutton Interface
20
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When F
L(S)
and F
R(S)
= 2 (LMR, AMBLI, and AMBRI are
connected with the multiplier network of Figure 8), the
equations become:
Use a passive filter network as shown in Figure 9 to filter
and delay the LMR signal in more advanced applications.
LOUT
L
R
ROUT
R
L
IN
IN
IN
IN
=
=
3
2
1
2
3
2
1
2
-
-
where
L
R
is the signal at LMR
IN
IN
-
4
⎛
⎝⎜
⎞
⎠⎟
.
LOUT L
F
L
R
ROUT R
F
L
R
IN
L S
IN
IN
IN
R S
IN
IN
=
+
Ч
=
Ч
( )
( )
(
)
(
)
-
-
-
4
4
1
0
PUSHBUTTON PRESSED
SWITCH
CONTACT
IS BOUNCING
SWITCH
CONTACT
IS STABLE
SWITCH
CONTACT
IS BOUNCING
READY TO ACCEPT
ANOTHER BUTTON PRESS
INPUT ACCEPTED
t
LPW
t
WS
t
HPW
DEBOUNCE BY
WAITING FOR
STABLE LOW, t
IPW
WAIT FOR
FIRST ZERO
CROSSING, t
WS
DEBOUNCE BY
WAITING FOR
STABLE HIGH, t
HPW
WIPER MOTION
WIPER MOVES HERE
Figure 11b. Wiper Transition Timing Diagram (Zero Crossing Detected)