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Philips Electronics

Supply circuit with power-down for telephone set peripherals

Philips Electronics

Supply circuit with power-down for telephone set peripherals

Philips Electronics

Supply circuit with power-down for telephone set peripherals

Philips Electronics

Listening-in circuit for line-powered telephone sets

Philips Electronics

Call progress monitor for line powered telephone sets

Philips Electronics

Call progress monitor for line powered telephone sets

Philips Electronics

Listening-in circuit for line-powered telephone sets

Philips Electronics

Listening-in circuit for line-powered telephone sets

Philips Electronics

SMPS battery charger control circuit

Philips Electronics

Supply circuit with power-down for telephone set peripherals

Philips Electronics

Listening-in circuit for line-powered telephone sets

Philips Electronics

Call progress monitor for line powered telephone sets