| 摘要 |
A liquid crystal display driver and power supply for use with a telephone dialing circuit reduces the potential of an external power supply to the telephone dialing circuit to a desired voltage level. The reduced potential is then stabilized and a second voltage signal, which is a function of the stabilized voltage signal, is generated to drive and supply power to a liquid crystal display of the telephone dialing circuit. The liquid crystal display driver and power supply and the telephone dialing circuit can be integrated in a single IC chip.
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