Doepfer A-148 User Manual
doepfer
A-148
DUAL S&H
Trig. In
Smp. In
Control
S&H Out
System A - 100
1. Introduction
Module A-148 (Dual S&H) has two identical sample &
hold modules, designed to produce ‘staircase’ voltages.
The signal present at the sample input (voltage range
-8V...+8V) is sampled at a rate set by the signal at the
trigger input, and held at that voltage at the S&H
output.
The exact shape of the staircase depends on the sort
of waveform at the sample input: NOISE or RANDOM
signals produce random patterns; an LFO produces
rising or falling staircase patterns.
Two LEDs for each S&H indicate the voltage (positive
or negative) of the sampled signal.
Dual S&H A-148
Trig. In
Smp. In
Control
S&H Out
From August 2005 an improved version of the module
is manufactured: For each sub-module the operation
mode S&H (sample&hold) or T&H (track&hold) can
be selected by a jumper. In T&H mode the output signal follows the input signal while the trigger input is
"high". As soon as the trigger input turns to "low" the
last voltage is stored. The factory setting is S&H for
the upper device and T&H for the lower device. In addition the complete A-100 voltage range -12...+12V
can be processed (no longer limited to -8...+8V as for
the previous version).
1
A-148
Dual S&H
System A - 100
doepfer
2. Overview
➊
➋
➌
A-148
DUAL S&H
Trig.
In
Smp.
In
S&H
Out
Ctr.
-
Trig.
In
Smp.
In
S&H
Out
Ctr.
-
Indicators:
LEDs: sampled voltage status indicators
1
In / Outputs:
! Trig In : Input for trigger signal
Smp In
"
S&H Out : Output for sampled (and held) voltage
§
+
+
➀
: Input for signal to be sampled
2
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