4
SAMPLE & HOLD
SSH
SSH Users Manual
retroaktiv
SAMPLE & HOLD
The sample & hold generator generates a staircase-type waveform by sampling an
input signal (8v to - 8v recommended) at an interval set by the internal sample & hold
clock or an external trigger signal. The input signal is sampled at the positive leading
edge of incoming clock signals. The stepped S&H waveform can be accessed at the
STEP output jack.
The internal white noise generator is normalized to the S&H signal input, which will
generate a random staircase waveform. External signals (8v to -8v) can be sampled by
plugging into the EXT input jack. This will break the normalized connection between
the noise source output and the S&H signal input.
NOISE GENERATOR
The noise circuit is a 5vpp white noise source. This can be accessed at the NOISE output
jack. The noise generator is normalized to the sample & hold input, which generates a
random staircase output waveform.
SLEW LIMITER & WAVESHAPING CIRCUIT
The SSH contains a complex slew limiter circuit which is used to limit the rate at which
the staircase waveform can change. By adding slew, a sharp edged staircase waveform
becomes rounded as the slew effect limits the rate at which the voltage can change.
The slope of the slewing is set by the SLOPE knob. With SLOPE set to fully count-
er-clockwise position, the slope of the slewing effect will be exponential. When set
to center position, the slope will be linear. The slope of the slew can morph between
exponential and linear when set to any position between EXP and LIN. (See figure 3)
Figure 3 - Slope knob function (SYM mode)
