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US 11,942,913 B2Granted
Variable gain amplifier
AssigneeNippon Telegraph and Telephone Corporation
InventorsHiroshi Hamada, Hideyuki Nosaka
Life of this patent
Estimating the term…
Abstract
A gain adjustment unit constituted by a distribution switch having a control terminal is provided in an input unit of an amplifier circuit. One end of a coupler is connected to an output line of the amplifier circuit, another end of the coupler is connected to an anode of a diode, and a monitor terminal is connected via a low-pass filter to a cathode of the diode. The anode of the diode is unbiased.
Claims19
A variable gain amplifier, comprising:
- a gain adjuster comprising a switch having a control terminal in an input of an amplifier circuit;
- and
- a power monitor branched in an output of the amplifier circuit, wherein the power monitor comprises:
- a coupler, a first end of the coupler being connected to an output line of the amplifier circuit;
- a diode, an anode of the diode being connected to a second end of the coupler;
- and
- a monitor terminal connected to a cathode of the diode via a low-pass filter, the anode of the diode being set to ground potential.
4 more elements
A method comprising:
- connecting a power monitor in an output of an amplifier circuit;
- wherein a gain adjuster comprises a switch having a control terminal in an input of the amplifier circuit;
- and
- wherein the power monitor comprises:
- a coupler, a first end of the coupler being connected to an output line of the amplifier circuit;
- a diode, an anode of the diode being connected to a second end of the coupler;
- and
- a monitor terminal connected to a cathode of the diode via a low-pass filter;
- and
- wherein the method further comprises setting the anode of the diode to ground potential.
7 more elements
Dependencies are inferred from the claim text.