Philips Electronics

Listening-in circuit for line-powered telephone sets

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

Call progress monitor 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

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

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