Radio Theory and design
Tuesday, January 30, 2018
CD4069UB amplifier
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The CD4069UB is a very useful device it can be an oscillator or amp with a simple biasing system much like the one in the previous post. The...
Sunday, January 28, 2018
Self bias and feedback
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I have posted this 'type' circuit before without much comment. This is from a Bell Lab report from the late '50s. Not my inventi...
Saturday, January 27, 2018
Manhatten pads with the pasta maker
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First the disclaimer: If you get caught using mama's pasta maker I did not recommend it!!! Get your own or borrow one from a clay worke...
Friday, January 26, 2018
Build a circuit in spice and check the parameters.
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spice has the curves built into it so you can display them and analyze the circuit. Common emitter is easiest so i started with it. ...
Thursday, January 25, 2018
Transistor circuit analysis
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transistor circuit analysis If you have a reasonable download speed this book is worth the trouble. It is only 250 pages but covers transis...
Wednesday, January 24, 2018
Using the data from the previous post
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Using the data Figure 5.14 represents the circuit. Step 1 uses the data. Step 2 uses that result.
Tuesday, January 23, 2018
How to determine the parameters for a transistor?
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This is the circuit in question. What is the input Z? As the circuit is given we have a 100k base resistor, Vcc of 1.2 volts. The simpl...
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