"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.

    Download

    Continue Reading

    Sponsored

    The advent of USB Type-C marked a turning point in connectivity. This compact, reversible connector has transformed the way we exchange data and power our devices, offering accelerated...
    The Same Sky interconnect group carries a comprehensive line of connectors to reduce the burden on the design engineer. Their wide selection of mechanical configurations and simple...
    Explore ADAM, an advanced AMR demo by Analog Devices, featuring precision depth sensing, AI mapping, 4-wheel motor control, ROS support, and smart battery & comms. Boost safety...
    In a generic electronic system there are some inputs that are controlled by the end user. These inputs are read by electronics and acted upon by using outputs.