Index of pages in Poul's circuit examples
Key specifications for some current source circuits.
White noise generator
Linear white noise generator for the audio bandwidth.
Pink noise filter
Accurate pink noise filter for the audio bandwidth.
2 transistor buffer
Emitter follower circuit with improved drive capability.
Full wave signal rectifiers for low frequency signals.
Logarithmic amplifiers with wide dynamic range for low frequency applications.
Schematic for a common DI box circuit and schematic and specification for a higher performance circuit.
I2C bus isolators
Schematics for some simple I2C bus isolators and for a galvanically isolated one.
Spice filter models
A collection of some standard transfer functions for use with Spice simulators.
Increasing OP-AMP output current
A simple way to increase the output current of an OP-AMP.
DIY MC pre-amplifier
Simple DIY MC pre-amplifier.
Frequency and duty-cycle calculation for simple astable multivibrator built around an OP-AMP or comparator.