Radio Shack TRS-80 26-3650

Filter
waveforms
approx. I
~*l
1.2
kHz
r*
|<
sj
approx.
2.4
kHz
-3V
@
-3V
©
-3V
Data
output
C2
from the
LSI
is
integrated
(waveform
(§)
)
and shaped into
an AC
waveform
(waveform
©
)
by
capacitor
d
and
resistor
r1.
©
®
<B>
Input
signal from
tape
recorder
®
is
integrated by
capacitor c2 and
resistors r2
and r3
(waveform
(|)).
The
waveform
(§)
is
cramped between
—
3V
and OV by
diodes d1 and d2.
-
19-