Electronic switch and electronic apparatus including the same

Patent metadata

Field	Value
Publication number	US-10855267-B2
Application number	US-202016831878-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 29, 2019
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

An electronic switch includes a first NMOS transistor connected between a positive input terminal and an output terminal; a first diode, a second resistor, a first capacitor, and a third switching element sequentially connected in series between a drain of the first NMOS transistor and a negative input terminal; a first resistor connected between a positive input terminal and a node between the first capacitor and the third switching element; a third resistor connected between a gate of the first NMOS transistor and a node between the second resistor and the first capacitor; and a second capacitor, a second diode, and a fourth resistor connected in parallel between a source of the first NMOS transistor and a node between the third resistor and the gate of the first NMOS transistor.

First claim

What is claimed is:

1. An electronic switch, comprising:
a first NMOS transistor connected between a positive input terminal and an output terminal;
a first diode, a second resistor, a first capacitor, and a third switching element sequentially connected in series between a drain of the first NMOS transistor and a negative input terminal;
a first resistor connected between a positive input terminal and a node between the first capacitor and the third switching element;
a third resistor connected between a gate of the first NMOS transistor and a node between the second resistor and the first capacitor; and
a second capacitor, a second diode, and a fourth resistor connected in parallel between a source of the first NMOS transistor and a node between the third resistor and the gate of the first NMOS transistor.

2. The electronic switch according to claim 1 , further comprising a third diode connected in series between the third switching element and the negative input terminal.

3. The electronic switch according to claim 1 , further comprising a second NMOS transistor connected in series in a reverse direction between the first NMOS transistor and an output terminal.

4. The electronic switch according to claim 1 , further comprising a fourth switching element connected in series between the negative input terminal and a node between the third resistor and the second capacitor.

5. The electronic switch according to claim 1 , wherein the second diode is a Zener diode.

6. The electronic switch according to claim 1 , wherein the third switching element is a triode with a high-frequency characteristic.

7. The electronic switch according to claim 1 , wherein the second capacitor is a pF level capacitor.

Assignees

• Murata Manufacturing Co

Inventors

• Ning Long
• Li Gang

Classifications

• H03K17/687 Primary

  the devices being field-effect transistors · CPC title

• H03K2217/0081

  Power supply means, e.g. to the switch driver · CPC title

• H03K2217/0036

  Means reducing energy consumption · CPC title

• H03K17/163

  Soft switching · CPC title

• H03K17/04123 Primary

  in field-effect transistor switches · CPC title