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Philips Electronics

High efficiency DC/DC converter

Philips Electronics

Supply circuit with power-down for telephone set peripherals

Temic Semiconductors

Simple phase control circuit

Philips Electronics

Control circuit for switched-mode power supply

Philips Electronics

Call progress monitor for line powered telephone sets

STMicroelectronics

VIDEO AND AUDIO SIGNALS SWITCHINGS FOR THE PERI-TELEVISION PLUG

Unspecified

VERSATILE TELEPHONE TRANSMISSION CIRCUITS WITH DIALLER INTERFACE

Philips Electronics

Versatile speech/dialler/ringer with music-on-hold

Unisonic Technologies

LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE

Unspecified

TELEFUNK ELECTRONIC CREATIVE TECHNOLOGIEN U2200B-FP