Username jdh30
Member Since April 2, 2013

jdh30's Public Circuits:

Now showing circuits 1-14 of 14. Sort by

Basic Darlington Pair operation

Basic Darlington Pair operation PUBLIC

In a darlington pair, two BJTs form a single high-gain current amplifier.

by jdh30 | updated April 24, 2013

Voltage regulated lamp

Voltage regulated lamp PUBLIC

Using a 7805 to convert 24V DC into 5V DC.

by jdh30 | updated April 24, 2013

Basic Bipolar Junction Transistor operation

Basic Bipolar Junction Transistor operation PUBLIC

BJTs are current amplifiers: the collector current is a multiple of the base current.

by jdh30 | updated April 24, 2013

Current mirror

Current mirror PUBLIC

The current through the transistor on the left is mirrored by the transistor on the right.

by jdh30 | updated April 24, 2013

Basic MOSFET operation

Basic MOSFET operation PUBLIC

MOSFETs convert gate voltage into drain current but require a gate voltage of at least a few volts to operate.

by jdh30 | updated April 24, 2013

Unregulated power supply

Unregulated power supply PUBLIC

A very simple power supply that converts mains AC into low voltage DC.

by jdh30 | updated April 24, 2013

Cockcroft-Walton cascade multiplier

Cockcroft-Walton cascade multiplier PUBLIC

Multiply up an AC voltage to much higher voltages.

by jdh30 | updated April 24, 2013

Crossover distortion

Crossover distortion PUBLIC

The ~0.6V turn-on gate voltage of a BJT introduces significant distortion when BJTs are used directly in a push-pull amplifier.

by jdh30 | updated April 24, 2013

Current sources

Current sources PUBLIC

Three different constant current sources using BJTs, JFETs and a Zener diode.

by jdh30 | updated April 24, 2013

Push-pull BJT amp with biasing diodes

Push-pull BJT amp with biasing diodes PUBLIC

by jdh30 | updated April 17, 2013

Constant current using JFET

Constant current using JFET PUBLIC

by jdh30 | updated April 17, 2013

JFET Follower

JFET Follower PUBLIC

by jdh30 | updated April 17, 2013

Non-inverting amplifier

Non-inverting amplifier PUBLIC

by jdh30 | updated April 02, 2013

Inverting amplifier

Inverting amplifier PUBLIC

by jdh30 | updated April 02, 2013