Two buffer amps remove RAB from RMAX equation, allowing for an RMAX extending far into the megaohms
| Authors | Stephen Woodward |
| Main Document | Article «Synthesize precision Dpot resistances that aren't in the catalog» |
| Description | Figure 5 |
| File Format / Size | PDF / 15 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Synthesize precision Dpot resistances that aren't in the catalog»
- Figure 1. Classic variable resistance with the series connection of a manually adjusted rheostat-connected pot and a fixed resistor
- Figure 2. Synthetic Dpot evades problems using FET shunt, precision fixed resistors, and op-amp
- Figure 3. Synthetic rheostat design example where RMAX = 20k and RMIN = 1k
- Figure 4. Performance of Figure 3's circuit with values shown, the linear relationship between N and IAВ conserves the Dpot's limited 8-bit resolution
- Figure 5. Two buffer amps remove RAB from RMAX equation, allowing for an RMAX extending far into the megaohms
