An unusual path to a power-handling DAC by merging an upside-down LM337 regulator with a PWM circuit to make a 20-V, 1-A current source.

Demand for voltage-controlled current sources (VCCSs) and multipliers in a wide spectrum of electronics and communication devices always seems to exist. The multipliers employed in circuits like ...

Author Mazi Hosseini describes a simple, low-cost, voltage-controlled current source using two op amps that provides a good range of current and maximum load.

The circuit thus simplifies the testing of such devices in isolation, because modulated voltage sources are readily available, but modulated current sources generally are not. A further use of the ...