US 7,257,222 B2 · Ring voltage generation circuit and method for generating a ring voltage

Abstract

The present invention relates to a ring voltage generation circuit for generating a ring voltage (VTR) between a TIP lead (9) and a RING lead (10) with minimized power loss for electronic subscriber circuits, comprising: a) an amplifier circuit (2) which receives an input voltage (VI) for amplifying the input voltage (VI) to provide the ring voltage (VTR); b) an absolute value generator (3) which receives the input voltage (VI), measures an absolute value (|VI|) of the input voltage (VI) and outputs the measured absolute value (|VI|) of the input voltage (VI); c) a DC/DC converter (4) which receives the measured absolute value (|VI|) of the input voltage (VI) and converts the measured absolute value (|VI|) of the input voltage (VI) into a supply voltage (VSUPPLY) for the amplifier circuit (2); and d) a common mode feedback device (5) which receives the supply voltage (VSUPPLY), a TIP potential (VT) of the TIP lead (9) and a RING potential (VR) of the RING lead (10) and which generates thereof a control voltage (VC), whereas the common mode feedback device (5) controls the amplifier circuit (2) by means of the control voltage (VC)

Claims20

Dependent claims

A ring voltage generation circuit for generating a ring voltage signal between a TIP lead and a RING lead;

comprising:
a) an amplifier circuit configured to receive an input voltage signal and to amplify the input voltage signal in order to generate the ring voltage signal;
b) an absolute value generator configured to receive the input voltage signal and to generate a measured absolute value of the input voltage signal;
c) a DC/DC converter configured to receive the measured absolute value of the input voltage signal and to convert the measured absolute value into a supply voltage for the amplifier circuit, the DC/DC converter operably coupled to provide the supply voltage to a supply input of the amplifier circuit;
and
d) a common mode feedback device configured to receive the supply voltage, a TIP potential of the TIP lead and a RING potential of the RING lead, and further configured to generate a control voltage based on the received supply voltage, TIP potential of the TIP lead, and RING potential, wherein the common mode feedback device is operable to control the amplifier circuit using the control voltage.

3 more elements

A ring voltage generation circuit for generating a ring voltage signal between a TIP lead and a RING lead;

comprising:
a) an amplifier circuit configured to receive an input voltage signal and to amplify the input voltage signal in order to generate the ring voltage signal;
b) an absolute value generator configured to receive the input voltage signal and to generate a measured absolute value of the input voltage signal;
c) a DC/DC converter configured to receive the measured absolute value of the input voltage signal and to convert the measured absolute value into a supply voltage for the amplifier circuit, the DC/DC converter operably coupled to provide the supply voltage to a supply input of the amplifier circuit;
d) a common mode feedback device configured to receive the supply voltage, a TIP potential of the TIP lead and a RING potential of the RING lead, and further configured to generate a control voltage based on the received supply voltage, TIP potential of the TIP lead, and RING potential, wherein the common mode feedback device is operable to control the amplifier circuit using the control voltage;
and
wherein the amplifier circuit comprises a differential amplifier, and wherein the DC/DC converter is configured to provide the supply voltage to the differential amplifier.

4 more elements

Dependencies are inferred from the claim text.

Ring voltage generation circuit and method for generating a ring voltage

Life of this patent

Ring voltage generation circuit and method for generating a ring voltage

Life of this patent

Abstract

Claims20