Stmicroelectronics S.r.l.

Microsemi Semiconductor (u.s.) Inc.

Walter Rossi

Pietro Consiglio

Carlo Antonini

Ferdinando Lari

David Nigel Wakely

Jason Larry Rabb

Luigi Vergani

A voltage regulator includes a switch coupled between an input voltage terminal and an energy storage element, a first output capacitor coupled to a first node defined between the switch and the energy storage element, the first capacitor being coupled to a first output voltage terminal, a charge pump circuit coupled to the first node and comprising a second output capacitor coupled between a second output voltage terminal and the first output voltage terminal, and a controller operable to selectively enable the switch to control voltages generated at the first and second output terminals.

Voltage regulator with charge pump for generating second voltage source

A subscriber's telephone system is presented that includes at least one driver circuit connected to Tip and Ring terminals. An additional network is connected between an output of the driver circuit and the Ring terminal. This additional network includes a suitably dimensioned capacitor and a diode limiter connected in parallel with each other to minimize the overall voltage while maintaining a desired battery mean value.

Telephone subscriber system

Growing community of inventors

Pozzo d'Adda, Italy

Walter Rossi