From yahoo Sent Fri, May 2nd 2014, 08:31
From yahoo Sent Fri, May 2nd 2014, 08:31
Dan, you find my answers written inline. Best wishes Dieter Doepfer __________________________________________________________________ Doepfer Musikelektronik GmbH Geigerstr. 13 82166 Graefelfing / Germany registered in Munich/Germany, commercial registry HRB 97 399 CEO's: Sibille Heller, Dieter Doepfer European VAT ID No. DE129329318 website: www.doepfer.com __________________________________________________________________ > -----Ursprüngliche Nachricht----- > Von: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > [mailto:xxxxxxx_xxxx@xxxxxxxxxxx.xxx]Im Auftrag von > xxxxxxx_xxx@xxxxx.xxx > Gesendet: Mittwoch, 30. April 2014 21:11 > An: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > Betreff: [Doepfer_a100] A-165 > > > > > Hi there havea a couple of questions about the A-165 trigger modifier. > > First of all. I understand it can be used as a gate inverter. > Is a gate inverter essentially the same thing as a NOT (logic) gate? yes (in contrast to a voltage inverter that inverts the complete analog voltage including the voltage value, e.g. +3.5 become -3.5V or -6.4 V become +6.4V). The gate inverter does not consider the exact voltage value but only the state (low or high). In logical circuits (e.g. TTL) there are typically 3 voltage ranges: low state (e.g. 0...+2.5V), undefined state (e.g. +2.5 ... +3.5V) and high state (e.g. +3.5 ... +5.0). > Secondly. > > I see the gate inverter will convert 5v to 0v, and from 0v to 5v. No. For the A-165 any incoming voltage beyond about +2V (i.e. ~ 2 ... 12V) will cause the inverted output turn to low (close to 0V). Any incoming voltage less than about +2V will cause the inverted output turn high to a value close to +12V. The manual is a bit vague concerning the in/output voltages. The reason is that the A-100 is very "tolerant" concerning logic levels. Any voltage beyond about +2.5V is typically treated as "high". This is because each digital input (clock, gate, trigger ...) is usually equipped with an input transistor stage that responds to voltages beyond about +2V. Consequently any voltage in the range +2 ... 12V can be used to trigger the digital input of an A-100 module. The only exception is the gate input of the A-112 which requires at least +5V (+5...12V) as it has no input transistor stage. > This is great, but must it receive a 5v signal first so it knows > what value to change the 0v signal too? > > It doesn't seem to specifiy this in the manual online and I > haven't purchased one yet so was wondering if anyone could clear that up. > > I'm guessing either > a) it needs a 5v signal first (to know what to convert 0v to) > or > b) it defaults to 5v (perhaps changeable by internal jumper) > > Cheers > > > Dan > ------------------------------------ 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/