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GL6851 - TWO TONE RINGER

Description

The GL6851 tone ringer is a monolithic device, which incorporates two oscillators, an output amplifier and a power supply control circuit.

The oscillator frequencies can be adjusted over a wide range by selection of external components.

Features

  • Low current consumption. Designed for telephone bell replacement. Small size.

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Full PDF Text Transcription

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GL6851 GL6851 TWO TONE RINGER Description The GL6851 tone ringer is a monolithic device, which incorporates two oscillators, an output amplifier and a power supply control circuit. The oscillator frequencies can be adjusted over a wide range by selection of external components. One oscillator, normally operated at a low frequency, causes the second oscillator to alternate between its nominal frequency, and a related higher frequency. The resulting output is a distinct warbling tone. The output amplifier will drive either a transformer coupled loudspeaker or a piezo-ceramic transducer. The device can be powered from a telephone line or a fixed d.c. supply. The GL6851 has provision for adjustment of the supply initiation current.
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