From yahoo Sent Tue, Jul 7th 2015, 15:06
From yahoo Sent Tue, Jul 7th 2015, 15:06
That's what the transistor inputs of the A-100 gate inputs do - although it's not exactly the same as a comparator. I.e. any positive voltage beyond ~ +3V is treated as "high". Best wishes Dieter Doepfer > -----Ursprüngliche Nachricht----- > Von: xxxxxxx_xxxx@xxxxxxxxxxx.xxx [mailto:xxxxxxx_xxxx@xxxxxxxxxxx.xxx] > Gesendet: Dienstag, 7. Juli 2015 15:47 > An: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > Betreff: RE: AW: [Doepfer_a100] The A185-1 > > > > > > It's good that a lot of modules now have comparators on the inputs that trigger off pretty much any positive voltage. > It's a luxury really but worth considering for future Deopfer modules as well. > > > > To: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > > From: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > > Date: Mon, 6 Jul 2015 18:04:34 +0200 > > Subject: AW: [Doepfer_a100] The A185-1 > > > > Module A-185-1 was designed in 1997 and at this time there were no other (or only a few) other module manufacturers on > the market. > > The gate section of the A-185-1 is only a buffer (nothing but a so-called emitter follower) but does not increase the > gate voltage. > > Rather the emitter follower lowers the voltage a bit (by about 0.7V). The A-185-1 was designed to be used with A-100 > modules only > > and for A-100 modules there was this rule for gate voltages: <1V means low and >3V means high. All A-100 modules that > process gate > > signals (especially envelope generators, clock divider, trigger delay and so on) have usually a transistor at the gate > input that > > requires about 1.5-2 V to trigger. But I'm aware that things have changed and we will redesign the A-185-1 so that the > gate output > > voltage can be set to +5V or +12V (probably by means of a jumper) and that it does no longer work as a buffer. > > > > Best wishes > > Dieter Doepfer > > > > > > > About the A185-1 > > > > > > Maybe it's just me using the module the wrong way. > > > > > > This is the setup: > > > > > > A190-1 Clock Out ---> 1st A185-1 Gate In > > > > > > 1st A185-1 Gate Out ---> 2nd A185-1 Gate In > > > > > > 2nd A185-1 Gate Out ---> Intellijel Metropolis Gate In > > > > > > > > > The Metropolis (and probably other modules too) doesn't trigger well because the gate signal is too weak. I did some > measurements. > > > > > > A190-1 Clock Out ------ +4.1V > > > 1st A185-1 Gate Out --- +3.4V > > > 2nd A185-1 Gate Out --- +2.7V > > > > > > Why not keep the gate signal as say +5V? > > > > > > For this purpose I build myself a simple "Gate Amp". Just an idea. > > > > > > Best regards, > > > Karel. > > > > > > > > ------------------------------------ > > > > ------------------------------------ > > > > > > ------------------------------------ > > > > Yahoo Groups Links > > > > > > > > > > > ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Doepfer_a100/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Doepfer_a100/join (Yahoo! ID required) <*> To change settings via email: xxxxxxx_xxxx-xxxxxx@xxxxxxxxxxx.xxx xxxxxxx_xxxx-xxxxxxxxxxxx@xxxxxxxxxxx.xxx <*> To unsubscribe from this group, send an email to: xxxxxxx_xxxx-xxxxxxxxxxx@xxxxxxxxxxx.xxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/