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5 Transistors Linear Triangle Wave Generator

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iimagine

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Thought I should share my latest design to get some feed back and suggestion.
No constant current source/sink!
 

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schmitt trigger

schmitt trigger

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I love discrete semiconductor circuits. Especially when they are simple and elegant like yours.

But as FvM mentioned, Q4 and Q5 are gated current sources. Otherwise the capacitor would not charge linearly.
 

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FvM said:
What are Q4/Q5 if not current sources?
Click to expand...

Right, well they are switches for charging and discharging arranged to act as constant current source, what i meant by no constant current was the conventional current mirror, 2 transistors source/sink ect...
 

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