Electronic device and electroacoustic conversion apparatus

Patent metadata

Field	Value
Publication number	US-2023253927-A1
Application number	US-202118005033-A
Country	US
Kind code	A1
Filing date	Jun 22, 2021
Priority date	Jul 21, 2020
Publication date	Aug 10, 2023
Grant date	—

Abstract

[Object]To provide an electronic device and an electroacoustic conversion apparatus that can suppress noise.[Solving Means]According to the present disclosure, there is provided an electronic device including a switching element unit that applies a voltage based on a direct-current power supply to one end of an electroacoustic converter in response to a first pulse signal and applies a voltage based on the direct-current power supply to another end of the electroacoustic converter in response to a second pulse signal, and a delay circuit that generates a delay based on a communication frequency in at least one of the first pulse signal and the second pulse signal.

First claim

1 . An electronic device comprising:
a switching element unit that applies a voltage based on a direct-current power supply to one end of an electroacoustic converter in response to a first pulse signal and applies a voltage based on the direct-current power supply to another end of the electroacoustic converter in response to a second pulse signal; and a delay circuit that generates a delay based on a communication frequency in at least one of the first pulse signal and the second pulse signal.

2 . The electronic device according to claim 1 , wherein the delay circuit generates a delay time period based on a cycle of the communication frequency.

3 . The electronic device according to claim 2 , wherein the delay time period is one half of the cycle of the communication frequency.

4 . The electronic device according to claim 1 , wherein
the switching element unit includes
first and second switching elements connected in series to the direct-current power supply, and
third and fourth switching elements connected in series to the direct-current power supply, and
the electroacoustic converter is connected at the one end thereof to a connection point between the first and second switching elements and at the other end thereof to a connection point between the third and fourth switching elements.

5 . The electronic device according to claim 4 , further comprising:
a first gate controlling circuit that switches the first switching element on and off in response to the first pulse signal and switches the second switching element off when the first switching element is switched on but switches the second switching element on when the first switching element is switched off; and a third gate controlling circuit that switches the third switching element on and off in response to the second pulse signal and switches the fourth switching element off when the third switching element is switched on but switches the fourth switching element on when the third switching element is switched off.

6 . The electronic device according to claim 1 , further comprising:
a pulse generator that generates the first pulse signal and the second pulse signal, wherein the first pulse signal includes a pulse signal having a duty ratio according to a level of a sound signal, and the second pulse signal includes another pulse signal having a duty ratio according to the level of the sound signal.

7 . The electronic device according to claim 1 , further comprising:
a pulse generator that generates a pulse signal according to a level of a sound signal, wherein the the delay circuit generates the first pulse signal delayed by a first delay time period based on a cycle of the communication frequency and the second pulse signal delayed by a second delay time period based on the cycle of the communication frequency.

8 . The electronic device according to claim 7 , wherein
the delay circuit includes
a first flip-flop circuit having a D terminal to which the pulse signal is inputted, a clock terminal to which a clock signal based on the cycle of the communication frequency is inputted, and a Q terminal from which the first pulse signal is outputted, and
a second flip-flop circuit having a D terminal to which the first pulse signal is inputted, a clock terminal to which the clock signal is inputted, and a Q terminal from which the second pulse signal is outputted.

9 . The electronic device according to claim 7 , wherein
the delay circuit includes
a first delay circuit to which the pulse signal is inputted,
a second delay circuit to which an output signal of the first delay circuit is inputted,
an exclusive OR circuit to which the pulse signal and an output signal of the second delay circuit are inputted,
an ethical product circuit to which an output signal of the exclusive OR circuit and a clock signal based on the cycle of the communication frequency are inputted,
a first flip-flop circuit having a D terminal to which the output signal of the first delay circuit is inputted, a clock terminal to which an output signal of the ethical product circuit is inputted, and a Q terminal from which the first pulse signal is outputted, and
a second flip-flop circuit having a D terminal to which the first pulse signal is inputted, a clock terminal to which the output signal of the ethical product circuit is inputted, and a Q terminal from which the second pulse signal is outputted.

10 . The electronic device according to claim 1 , further comprising:
a frequency synthesizer that generates a signal of a reference frequency according to the communication frequency, wherein the delay circuit is driven on a basis of the signal of the reference frequency.

11 . The electronic device according to claim 10 , wherein the reference frequency to be outputted from the frequency synthesizer is switched according to a time zone.

12 . The electronic device according to claim 10 , further comprising:
a communication instrument that performs at least one of transmission and reception with the communication frequency based on the reference frequency.

13 . An electronic device comprising:
a communication instrument that performs at least one of transmission and reception with a communication frequency; and a switching element unit that applies a voltage based on a direct-current power supply to an electroacoustic converter in response to two pulse signals based on a sound signal, wherein at least one of the two pulse signals is delayed by a cycle based on the communication frequency.

14 . An electroacoustic conversion apparatus comprising:
the electronic device according to claim 1 ; and the electroacoustic converter.

Assignees

• Sony Semiconductor Solutions Corp

Inventors

• Nakahara Hironori
• Miyazaki Daisuke

Classifications

• H03F1/26 Primary

  Modifications of amplifiers to reduce influence of noise generated by amplifying elements · CPC title

• H03F3/2178

  using more than one switch or switching amplifier in parallel or in series (H03F3/2173, H03F3/2175 take precedence) · CPC title

• H04B1/71637 Primary

  Receiver aspects (H04B1/7183 takes precedence) · CPC title

• H04B1/0475

  with means for limiting noise, interference or distortion (H04B1/0483 takes precedence) · CPC title

• H04B1/04

  Circuits · CPC title