Philips Electronics
Listening-in circuit for line-powered telephone sets
Philips Electronics
Versatile telephone transmission circuit with dialler interface
Philips Electronics
Hands free IC
Philips Electronics
Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer
Temic Semiconductors
Zero Voltage Switch with Fixed Ramp
Philips Electronics
Speech and handsfree IC
Philips Electronics
Low voltage transmission circuits with dialler interface
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