Switch apparatus

Patent metadata

Field	Value
Publication number	US-11050245-B2
Application number	US-201816168845-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Jan 19, 2018
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A switch apparatus is provided. The switch apparatus includes a signal control switch, a switch circuit, a blocking capacitor and a surge current dissipation circuit. The signal control switch and the switch circuit are respectively controlled by a first control signal and a second control signal to be turned on or off. The blocking capacitor is serially coupled between the switch circuit and a reference voltage end. The surge current dissipation circuit includes a Zener diode circuit or at least one diode circuit, and the at least one diode circuit has one or more diodes coupled in series. The one or more diodes coupled in series are coupled between two ends of the surge current dissipation circuit according to a first polarity direction.

First claim

What is claimed is:

1. A switch apparatus, comprising:
a first signal control switch, coupled between a first signal transceiving end and a second signal transceiving end, and configured to be turned on or off according to a first control signal;
a first switch circuit, coupled between the first signal transceiving end and a first reference voltage end, and configured to be turned on or off according to a second control signal;
a first blocking capacitor, serially coupled between the first switch circuit and the first reference voltage end; and
a first surge current dissipation circuit, having a first end coupled between the first switch circuit and the first blocking capacitor and a second end coupled to the first reference voltage end, and comprising a first Zener diode circuit or at least one first diode circuit, the at least one first diode circuit having one or more first diodes, wherein when more than one first diodes the first diodes are coupled in series, wherein the one or more first diodes are coupled between the first end of the first surge current dissipation circuit and the second end of the first surge current dissipation circuit according to a first polarity direction.

2. The switch apparatus of claim 1 , wherein the first Zener diode circuit has one or more Zener diodes, wherein when more than one Zener diodes the Zener diodes are coupled in series.

3. The switch apparatus of claim 1 , wherein a turn-on voltage of the first Zener diode circuit or a turn-on voltage of the first diode circuit is less than a breakdown voltage of the first blocking capacitor.

4. The switch apparatus of claim 1 , further comprising:
a second switch circuit, coupled between the first signal transceiving end and a second reference voltage end, and configured to be turned on or off according to a third control signal;
a second blocking capacitor, serially coupled between the second switch circuit and the second reference voltage end; and
a second surge current dissipation circuit, having a first end coupled between the second switch circuit and the second blocking capacitor and a second end coupled to the second reference voltage end, and comprising a second Zener diode circuit or at least one second diode circuit, the at least one second diode circuit having one or more second diodes, wherein when more than one second diodes the second diodes are coupled in series, wherein the one or more second diodes are coupled between the first end of the second surge current dissipation circuit and the second end of the second surge current dissipation circuit according to a second polarity direction, and the first polarity direction is opposite to the second polarity direction.

5. The switch apparatus of claim 1 , wherein when a number of the at least one first diode circuit is 2, one of the first diode circuits is coupled between the first end of the first surge current dissipation circuit and the second end of the first surge current dissipation circuit according to the first polarity direction, another one of the first diode circuits is coupled between the first end of the first surge current dissipation circuit and the second end of the first surge current dissipation circuit according to a second polarity direction, and the first polarity direction is opposite to the second polarity direction.

6. The switch apparatus of claim 5 , wherein a number of the first diodes included by said one of the first diode circuits is identical to or different from a number of the first diodes included by said another one of the first diode circuits.

7. The switch apparatus of claim 5 , wherein a sum of turn-on voltages of said one of the first diode circuits is identical to or different from a sum of turn-on voltages of said another one of the first diode circuits.

8. The switch apparatus of claim 5 , further comprising:
a first coupling capacitor, serially coupled between the first signal transceiving end and the first signal control switch; and
a second surge current dissipation circuit, having a first end coupled to the first signal transceiving end and a second end coupled between the first coupling capacitor and the first signal control switch, and comprising a second Zener diode circuit or at least two second diode circuits, each of the second diode circuits having at least one second diode, wherein one of the at least two second diode circuits is coupled between the first end of the second surge current dissipation circuit and the second end of the second surge current dissipation circuit according to the first polarity direction, and another one of the at least two second diode circuits is coupled between the first end of the second surge current dissipation circuit and the second end of the second surge current dissipation circuit according to the second polarity direction.

9. The switch apparatus of claim 5 , further comprising:
a first coupling capacitor, serially coupled between the first signal control switch and the second signal transceiving end; and
a second surge current dissipation circuit, having a first end coupled between the first signal control switch and the first coupling capacitor and a second end coupled to the second signal transceiving end, and comprising a second Zener diode circuit or at least two second diode circuits, each of the second diode circuits having at least one second diode, wherein one of the at least two second diode circuits is coupled between the first end of the second surge current dissipation circuit and the second end of the second surge current dissipation circuit according to the first polarity direction, and another one of the at least two second diode circuits is coupled between the first end of the second surge current dissipation circuit and the second end of the second surge current dissipation circuit according to the second polarity direction.

10. A switch apparatus, comprising:
a first signal control switch, coupled between a first signal transceiving end and a second signal transceiving end, and configured to be turned on or off according to a first control signal;
a first switch circuit, coupled between the first signal transceiving end and a first reference voltage end, and configured to be turned on or off according to a second control signal;
a first blocking capacitor, serially coupled between the first switch circuit and the first reference voltage end;
a first surge current dissipation circuit, having a first end coupled between the first switch circuit and the first blocking capacitor and a second end coupled to the first reference voltage end, and comprising a first Zener diode circuit or at least one first diode circuit, the at least one first diode circuit having one or more first diodes, wherein when more than one first diodes the first diodes are coupled in series, wherein the one or more first diodes are coupled between the first end of the first surge current dissipation circuit and the second end of the first surge current dissipation circuit according to a first polarity direction;
a second signal control switch, coupled between the second signal transceiving end and a third signal transceiving end, and configured to be turned on or off according to a third control signal;
a second switch circuit, coupled between the third signal transceiving end and a second reference voltage end, and configured to be turned on or off according to a fourth control signal; and
a second blocking capacitor, serially coupled between the second switch circuit and the second reference voltage end.

11. The switch apparatus of claim 10 , wherein the first Zener diode circuit has one or more Zener diodes, wherein when more than one Zener diodes the Zener diodes are c

Assignees

• Richwave Technology Corp

Inventors

• Chao Chuan-Chen

Classifications

• H02H9/025

  Current limitation using field effect transistors · CPC title

• G05F3/185 Primary

  and field-effect transistors · CPC title

• H03K17/081

  without feedback from the output circuit to the control circuit · CPC title

• H04B3/46

  Monitoring; Testing · CPC title

• H03K17/693

  Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors (logic circuits H03K19/00; code converters H03M5/00, H03M7/00) · CPC title