From Brian Willoughby Sent Sat, Jan 12th 2019, 22:09
From Brian Willoughby Sent Sat, Jan 12th 2019, 22:09
Good question. I=E2=80=99ll let Frank explain his specific situation. It=E2=80=99s entirely possible that a modern module might be limited to = 5 V inputs. I do not have any specific product examples, but digital = modules are almost always limited to 5 V. There seem to be quite a few = MIDI-to-CV and CV-to-MIDI converters that only work with 5 V, maybe +/-5 = V. I get the impression that full +/-10 V and +/-15 V or even +/-18 V = systems are getting more and more rare these days. Most vintage gear runs on +12 V or +15 V or higher power supplies, so a = 10 V input is no problem for any of the transistors (discrete or IC). = Granted, even a circuit running on 5 V could tolerate a 10 V input if a = current-limiting resistor were added in series, such that the resistor = would absorb the 5 V drop without slamming damaging current into the = input. However, not all circuit topologies can work with just a = current-limiting resistor. This is true for both discrete transistor and = op-amp circuits. There are a few op-amps that actually specify that the = inputs will tolerate high voltages so long as the current is limited to = a specific maximum. I=E2=80=99ve seen some that can specifically = tolerate +40 V or even +50 V even when the supply voltage is lower, but = I would not assume that everything would survive this treatment unless = specifically called out. Unfortunately, the passive attenuation solutions suggested might not = work in all situations. It really depends upon the specifics of the = gate/trigger input. An active gate/trigger level converter should work = in all situations, because changes in the load of the connected = gate/trigger input would not affect the output voltage of the level = converter. In a passive converter, different loads will produce = different results. The differences may not be important, but they=E2=80=99= re there. Brian Willoughby On Jan 12, 2019, at 12:40 PM, Florian Anwander wrote: > Just a stupid question: What for? > I don't know any trigger-/gate-in circuit, that would require an = attenuation. Or do you want to use the gate as control voltage? >=20 > Am 10.01.19 um 19:07 schrieb Frank Bonarrigo: >> Are there any ways to attenuate a gate or trigger signal variably ? = Im sure the answer is simple in modular format but are there jacks you = can get? Like a conversion jack. Im having a hard time explain it. I = know. Some thing that would bring a hot signal down to a certain range. >=20