I have a 1 volt 5hz triangle wave setting on 4vdc, I need to lower the 4vdc to 1vdc. (This is chip #1 output) I'm driving pin 7 of a XR2206, you adjust frequency by sinking between 1ua and 3ma from this pin. (This is chip #2 input) Chip #1 is driving a 4.7k resitor with a 220kohm to ground. Chip #2 Pin 7 is connected to the junction of the 4.7k and 220kohm. I want to avoid a negative supply. Thanks, Mike
Need help, level shifting
Dec 03, 2006
4 Replies
And what is chip #1?
Maybe post a schematic? A link, or on ABSE?
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Chip #1 is also an XR2206 pin 2 is a triangle output.
Post a schematic if you want help. I don't have time to reconstruct one from verbiage.
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Thanks Jim, I found a solution which led to better one. Mike
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