"Bolt-On" Circuit, Transistors Create Zero-Drift Current Source (.PDF Download)

March 14, 2016

A two-terminal current source using the basic circuit of Figure 1a can be enhanced by adding on an independent subcircuit that uses degeneration of a PNP transistor to achieve zero temperature coefficient (tempco or TC). This low-cost design is the result of collecting data on many semiconductor devices over a 15+ year period and frequent reviews of the data. ("Degeneration" is the insertion a resistor in series with the emitter, which decreases the gain of the amplifier but improves attributes such as linearity and input impedance.)...

Register or Sign in below to download the full article in .PDF format, including high-resolution graphics and schematics when applicable.

Sponsored

Slide switches offer a compact, reliable way to control circuits with a simple sliding motion—ideal for low-power, space-constrained applications. This technical overview breaks...
RECOM Power'sRxM series is an isolated 1W to 5W DC/DC converter that comes in a compact surface-mount package available with 4:1 inputs covering 5V, 12V, 24V, and 48V rails...
Explore Raspberry Pi’s imaging and AI tools in this free webinar with expert insights from Naushir Patuck. Register now to attend live or watch the recording later.
RECOMsRxxCTxxS series is an extremely compact 0.5 W DC/DC converter in a 10.3 mm x 7.5 mm x 2.6 mm, 16-pin SOIC SMD package. This converter can boast an ultra-wide temperature...