Amplifier for music signal and method of outputting waveform of music signal

Patent metadata

Field	Value
Publication number	US-11670272-B2
Application number	US-202017129936-A
Country	US
Kind code	B2
Filing date	Dec 22, 2020
Priority date	Dec 27, 2019
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

An amplifier and a method of outputting a waveform of a music signal capable of outputting a waveform of a music signal exceeding a power supply voltage is provided. An amplifier includes a power supply, an input terminal for a music signal, an amplifying circuit which amplifies the music signal using the power supply, and a jumping-up circuit which is connected to an output end of the amplifying circuit and outputs a waveform exceeding a voltage value of the power supply.

First claim

What is claimed is:

1. An amplifier comprising:
a first power supply;
a second power supply;
an input terminal which receives a music signal;
an amplifying circuit which amplifies the music signal using the power supply; and
a circuit which is connected in series between an output end of the amplifying circuit and a speaker load, the circuit comprises:
an inductor having one end connected to the output end of the amplifying circuit and another end connected to the speaker load;
a first diode having an anode connected to the other end of the inductor;
a second diode having a cathode connected to the other end of the inductor;
a first capacitor having one end connected to a cathode of the first diode and another end connected to the first power supply;
a second capacitor having one end connected to an anode of the second diode and another end connected to the second power supply; and
a resistor having one end connected to the cathode of the first diode and another end connected to the anode of the second diode.

2. The amplifier according to claim 1 , wherein
an output waveform of the circuit generates a resonance wave having a plurality of peaks during rising and falling of a waveform with respect to an input waveform of the music signal due to the inductor, the first capacitor and the second capacitor of the circuit, wherein a peak value of a first peak of the resonance wave exceeds a first power supply voltage or a second power supply voltage.

3. A method of outputting a waveform of a music signal, the method comprising:
amplifying the music signal by an amplifying circuit using a first power supply and a second power supply; and
outputting a waveform exceeding a voltage value of the power supply by a circuit connected in series between an output end of the amplifying circuit and a speaker load, wherein the circuit comprises:
an inductor having one end connected to the output end of the amplifying circuit and another end connected to the speaker load;
a first diode having an anode connected to the other end of the inductor;
a second diode having a cathode connected to the other end of the inductor;
a first capacitor having one end connected to a cathode of the first diode and another end connected to the first power supply;
a second capacitor having one end connected to an anode of the second diode and another end connected to the second power supply; and
a resistor having one end connected to the cathode of the first diode and another end connected to the anode of the second diode.

4. The method of outputting a waveform of a music signal according to claim 3 , wherein
an output waveform of the circuit generates a resonance wave having a plurality of peaks during rising and falling of a waveform with respect to an input waveform of the music signal due to the inductor, the first capacitor and the second capacitor of the circuit, wherein a peak value of a first peak of the resonance wave exceeds a first power supply voltage or a second power supply voltage.

5. The method of outputting a waveform of a music signal according to claim 3 , further comprising:
charging the first capacitor and the second capacitor through a damping element.

Assignees

• Roland Corp

Inventors

• Shida Mitsuo
• Morimoto Yoshinobu
• Takada Kosuke

Classifications

• H03F2200/03

  the amplifier being designed for audio applications · CPC title

• H03F2203/45151

  At least one resistor being added at the input of a dif amp · CPC title

• H03F1/327

  to emulate discharge tube amplifier characteristics · CPC title

• H03F2203/45528

  the FBC comprising one or more passive resistors and being coupled between the LC and the IC · CPC title

• H03F2200/549

  the amplifier comprising means to emulate the vacuum tube behaviour · CPC title