Philips Electronics

Speech and handsfree IC

Temic Semiconductors

Zero Voltage Switch with Fixed Ramp

Philips Electronics

Low voltage transmission circuits with dialler interface

Philips Electronics

Voice switched speakerphone IC

Philips Electronics

Speech and loudspeaker amplifie IC with auxiliary inputs/outputs and analog multiplexer

Telefunken Licences GmbH

Quasi Parallel Sound Processing with Quadrature Intercarrier Demodulator

Unspecified

Tone Ringer IC (14-Pin Plastic Package TO-116)

Philips Electronics

Versatile telephone transmission circuit with dialler interface

Philips Electronics

Speech and listening-in IC

Unspecified

13 BIT SERIES PARALLEL CONVERTER

Contek Microelectronics

LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE

Temic Semiconductors

Simple phase control circuit

Philips Electronics

Supply circuit with power-down for telephone set peripherals

Philips Electronics

Control circuit for switched-mode power supply