Moog Music MF-104Z Analog Delay - Manual (Page 18)

18
CIRCUIT CONFIGURATION:
Figure 9 is a simplified block diagram of the MF-104Z Analog
Delay. Some unique features of the circuit are described in the
following paragraphs.
The input signal goes directly to a low-noise, high-input-
impedance buffer amplifier. The gain is set by the DRIVE control.
This amplifier has two outputs: the bypass signal (which is an
accurate replica of the input signal), and the signal that feeds the
delay circuit. If the gain is too high (indicated by the INPUT
LEVEL
light going frequently to red), this amplifier may clip, and
the bypass signal may be audibly distorted. In general, the
DRIVE
control should be set so that the INPUT LEVEL light is
yellow most of the time, and goes into the red only occasionally
and briefly.
The heart of the audio path is the DELAY CIRCUIT function.
This includes lowpass input filters, compressor, bucket-brigade
Figure 9 - Simplified Block Diagram of the MF-104Z