GL6840 ringer equivalent, electronic two tone ringer.
Test Circuit
For GL6840A f1 =
* Low current consumption, in order to allow the 1000 f 2 = 0.717 x f1 fsweep = parallel operation of 4 devices C1(§ Ý )
* Integra.
GL6840A are monolithic integrated circuits designed to replace the mechanical bell in telephone sets, in connection with an electro acoustical converter. The device can drive either directly a piezo ceramic converter(buzzer) or a small loudspeaker. I.
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