Circuit Project Electronic

Photo sensors bridge the gap between light and electronics. Microchip’s Programmable Gain Amplifiers (PGAs) are not well suited for precision applications (such as CT scanners), but they can be effectively used in position photo sensing applications minus the headaches of amplifier stability. When the two, six or eightchannel PGA is used in this system, the [...]

This is a stronger type. It features mute and stand-by functions, which require some additional discrete devices. The rest is just the common op-ampish and power-ampish stuff. I’ve never built this one, so I’ve got no suggestions concerning practical construction.
source : www.elektropage.com

This Design Idea presents a simplified ac high-voltage amplifier that uses complementary, cascaded NMOS and PMOS transistors (Figure 1). The OP07 op amp has low input-offset voltage, low input-bias current, and high open-loop gain.
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