In order to help his friend prepare for a talk at DEFCON this weekend, [Craig] built an IR photodiode amplifier circuit. The circuit extended the detection range of the hack from a few inches to a few ...

In researching my latest article I ran across this paper about a “robust” photodiode amplifier (pdf). I use the scare quotes on purpose, since the whole article seemed a little fishy to me. The author ...

Linear Technology’s Glen Brisebois, winner of an EDN Innovation award for best contributed article, noticed my JFET blog post and was nice enough to send along a note and some circuits he likes for ...

Fig 1. Shown is a basic TIA circuit used in dual-supply systems. Fig 2. Figure 1’s TIA circuit was modified for a single supply. Fig 3. Here, the TIA circuit in Figure 2 places a photodiode directly ...

1. This circuit uses a JFET to bootstrap the cathode of the photodiode. It eliminates the effect of diode resistance and capacitance. This improves bandwidth and reduces noise, but puts a dc voltage ...

Transimpedance amplifiers (TIAs) form the essential front end of optical receivers, converting the minute current produced by a photodiode into a usable voltage signal. Design of TIAs for modern ...