A basic phototransistor (a) has a 5- to 8-μsec rise/fall time with a 1-k. resistor. An op amp can improve a phototransistor's response time (b) but performs poorly without additional phase compensation. Alternatively, you can use a transistor to isolate t
| Authors | David Magliocco |
| Main Document | Article «Circuit optimizes phototransistor bandwidth» |
| Description | Figure 1 |
| File Format / Size | PDF / 14 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Circuit optimizes phototransistor bandwidth»
- Figure 1. A basic phototransistor (a) has a 5- to 8-μsec rise/fall time with a 1-k. resistor. An op amp can improve a phototransistor's response time (b) but performs poorly without additional phase compensation. Alternatively, you can use a transistor to isolate t
- Figure 2. The relationship between worst-case rise time and load resistance for the basic phototransistor circuit indicates that for a TR of 42 μsec, RLOAD should equal 7.5 kΩ