Wide frequency range - narrow bandwidth LM324 oscillator

Reviewed an old concept - came out wit a new one . . .

in the follofing the timescale shows the actual time . . .

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[Eop]

after getting enough of the shortcomings with the quadrature and the wien bridge

these ones are not much better . . . yet :

• + the oscillation amplitude is determined
• + the oscillation voltage range is defined (offsets)
• – unfortunately avail. starting from above the 200Hz
• + the fixed frequency can be set by RC

(versus http://www.ti.com/lit/an/snoa854/snoa854.pdf)

[Eop]