What’s in a Vocoder – voice synthesisers and Robots
Kraftwerk, Styx and My Vocoder - Shaping human voices Generating and shaping audio and RF wave patterns has long been an interest for many and...
Transistor Equivalents – old equipment restoration
Where to find transistor equivalents? Restoring old gear can be a nightmare when it comes to some of the more obscure transistor types, and a...
Multiplexer and Demultiplexer switching (follow up)
Using Electronic switching to route signals As a follow up to our article on multiplexing (and demultiplexing) or MUX/DEMUX and running my own experimentation with...
Hexfets Vs Laterals Vs BJTs
Mosfet Devices Versus Bipolar Junction Transistors I will try not to be biased in this article. Pun intended. Again, no re-invention of the wheel so...
Winding your own OPT
Local suppliers - South Africa As an addendum to our previous article "Alternatives to Tube Output Transformers" we thought it pertinent to add a bit...
National Semiconductor – LME49811
The LME49811 from National Semiconductor / TI Greetings! Class D amplifiers and drivers are becoming so popular that some of the largest IC manufacturers are...
Protecting your Amplifier
Protection devices for Audio Amplifiers There is a lot of theory put into amplifier design and when one looks at these complicated circuits often the...
Current Mirrors and Long Tailed Pairs
Differential Amplifiers - what they do (Part One) Long tail pairs or differential amplifiers have one important purpose: To amplify the difference between two inputs...
Sziklai Pair and Quasi Complementary output stages
Sziklai versus Darlington The Sziklai, like the Darlington is a very high current gain device. After dabbling on a few pages about Darlington transistors, what...
National LM4702 Vs Sanken STK350-xxx
A look into National Semiconductor's LM4702 VAS First thing here for those that aren't aware: "SANTA CLARA, Calif., Sept. 23, 2011 /PRNewswire/ -- Texas Instruments...
