Intellijel Quad User manual
Quad Inverter Manual
Quad Inverter
Quad CV Inverter / Audio Buffer
Manual Revision: 2018.05.16
Quad Inverter Manual
Installation
Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power
supply.
Before Your Start
Before installing a new module in your case you must ensure your case’s power supply has
sufficient available capacity to power the module:
● Sum up the specified +12V current draw for all modules, including the new one. Do the
same for the -12 V and +5V current draw. The current draw will be specified in the
manufacturer's technical specifications for each module.
● Compare each of the sums to specifications for your case’s power supply.
● Only proceed with installation if none of the values exceeds the power supply’s
specifications. Otherwise you must remove modules to free up capacity or upgrade your
power supply.
You will also need to ensure you have enough free space (hp) as well as free power headers in
your case to fit the new module.
You can use a tool like ModularGrid to assist in your planning. Failure to adequately power your
modules may result in damage to your modules or power supply. If you are unsure, please
contact us before proceeding.
Installing Your Module
When installing or removing a module from your
case always turn off the power to the case and
disconnect the power cable. Failure to do so
may result in serious injury or equipment
damage.
Ensure the 10-pin connector on the power cable
is connected correctly to the module before
proceeding. The red stripe on the cable must
line up with the -12V pins on the module’s
power connector. The pins are indicated with
the label -12V, a white stripe next to the
connector, the words “red stripe”, or some
combination of those indicators.
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Quad Inverter Manual
Most modules will come with the cable already connected but it’s a good idea to double check
the orientation before proceeding. Be aware that some modules may have headers that serve
other purposes so ensure the cable is connected to the right one.
The other end of the cable, with a 16-pin
connector, connects to the power bus board of
your Eurorack case. Ensure the red stripe on the
cable lines up with the -12V pins on the bus
board. On Intellijel power supplies the pins are
labelled with the words “-12V” and a thick white
stripe.
If you are using another manufacturer’s power
supply, check their documentation for
instructions.
Once connected, the cabling between
a module and power supply should
resemble the photo shown to the right.
Before reconnecting power and turning
on your modular system, double check
that the ribbon cable is fully seated on
both ends and that all the pins are
correctly aligned. If the pins are
misaligned in any direction or the
ribbon is backwards you can cause
damage to your module, power supply,
or other modules.
After you have confirmed all the connections, you can reconnect the power cable and turn on
your modular system. You should immediately check that all your modules have powered on
and are functioning correctly. If you notice any anomalies, turn your system off right away and
check your cabling again for mistakes.
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Quad Inverter Manual
Operation
Intellijel’s Quad Inverter contains four voltage inverters [A - D] — each with an
input jack [1] on top and an output jack [2] beneath it. Each output is a buffered
inversion of the input signal. For example, if you send +3V DC to the input jack,
the inverted output will be -3V DC.
Similarly, if you send a waveform to an input, the output will be an inverted copy
of that waveform. This is particularly useful when you want a control voltage
(such as an LFO or envelope) to inversely impact the parameter it’s modulating.
The output of each inverter is normalled to the inverter immediately below it. So if
you patch a signal into Inverter A and patch nothing into InverterB, then the
signal is passed through from the output of A to the input of B, where it’s inverted
(again), making it identical to the signal appearing at the input of InverterA.
Similarly, if you also leave the InverterC input open, then the input to InverterA
is inverted a third time, making the output of InverterC identical to the output of
InverterA.
NOTE: Quad Inverter does not function as a stand-alone gate inverter (since
inverting a gate is not actually the same thing as inverting a voltage). For this you
need a logic inverter, such as the Intellijel Plog. You may, however, feed an output
from a Quad Inverter into a Triatt or Quadratt to offset the voltage such that gate
inversion occurs.
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Quad Inverter Manual
Technical Specifications
Width
2 hp
Maximum Depth
29 mm
Current Draw
4 mA @ +12V
17 mA @ -12V
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Table of contents
