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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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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.
 

What are Q4/Q5 if not current sources?

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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