Improving LM339 + "tunable" osc variant

► the tunable osc. as by selecting the RC net-wk

► the tests that lead to (as by what i've tested so far) "improved" v. of LMx93

► 2MHz - TEST (driven from realistic src. 74HC04 -- 1 gate has just about the power required!?)

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[Eop]

Couple of osc.-s based on LM339 planned for 2x AA voltage converter

the bad thing with the next is the threshold levels're floating with the supply voltage and specific set of components (makes it difficult to wick the reliable PWM out of it) . . . the concept design → ▼

INPUT below Negative rail - oscillator ▼

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[Eop]