US 2006/0052053 A1 · Receiver apparatus and satellite broadcast reception system therewith

Abstract

In an LNB 10, a power supply circuit 12 has pre-regulators PRa and PRb provided one for each of power supply paths respectively from ports 13a and 13b, a bypass portion BP that, when the potential difference between the output terminals of the pre-regulators PRa and PRb is greater than a predetermined threshold value, short-circuits together those output terminals, and main regulators REG1 and REG2 provided in the stage following the bypass portion BP to generate, from the output voltages Va′ and Vb′ of the pre-regulators PRa and PRb, drive voltages VA and VB for the internal circuits A and B. With this circuit configuration, simple though it is, even if there are instantaneous variations in the voltages fed from a plurality of receivers connected, no variations appear in the currents respectively extracted therefrom.

Claims8

Dependent claims

A receiver apparatus comprising:

a plurality of external terminals to which receivers are individually disconnectably connected;
a plurality of internal circuits having mutually different power source paths;
and
a power supply circuit that receives electric power from the receivers and generates drive voltages for the internal circuits,
wherein the power supply circuit includes:
pre-regulators provided one for each of power supply paths respectively from the external terminals;
a bypass portion that, when a potential difference between output terminals of the pre-regulators is greater than a predetermined threshold value, short-circuits together the output terminals;
and
main regulators provided in a stage following the bypass portion so as to generate, from output voltages of the pre-regulators, the drive voltages for the internal circuits.

6 more elements

A satellite broadcast reception system comprising:

a reflector;
a receiver apparatus connected to the reflector;
and
receivers connected to the receiver apparatus,
wherein the receiver apparatus includes:
a plurality of external terminals to which the receivers are individually disconnectably connected;
a plurality of internal circuits having mutually different power source paths;
and
a power supply circuit that receives electric power from the receivers and generates drive voltages for the internal circuits,
wherein the power supply circuit includes:
pre-regulators provided one for each of power supply paths respectively from the external terminals;
a bypass portion that, when a potential difference between output terminals of the pre-regulators is greater than a predetermined threshold value, short-circuits together the output terminals;
and
main regulators provided in a stage following the bypass portion so as to generate, from output voltages of the pre-regulators, the drive voltages for the internal circuits.

11 more elements

Dependencies are inferred from the claim text.

Receiver apparatus and satellite broadcast reception system therewith

Life of this patent

Receiver apparatus and satellite broadcast reception system therewith

Life of this patent

Abstract

Claims8