US 9,000,832 B1Granted

Switch

AssigneesHep Tech Co., Ltd., Ming-Feng Lin

InventorMing-Feng Lin

Life of this patent

Estimating the term…

Loading patent…

Abstract

A switch includes a first switching member and a latch circuit. A first terminal of the first switching member is electrically connected to a power source, while a second terminal thereof is electrically connected to a loading. The latch circuit includes a first transistor and a second transistor which are mutually electrically connected. The first transistor is electrically connected to the first terminal, and the second transistor is electrically connected to the control terminal. By inputting a trigger voltage to the second transistor, the second transistor and the first switching member are conducted, which makes the first transistor become conductive. After the first transistor becoming conductive, the first transistor provides electricity to the second transistor to cause latching effect, and to consequently keep the first switching member conductive.

Claims10

Dependent claims

A switch, which is provided between a power source and a loading, comprising:

a first switching member having a first terminal, a second terminal, and a control terminal, wherein the first terminal is electrically connected to the power source, and the second terminal is electrically connected to the loading;
the control terminal controls conduction between the first terminal and the second terminal;
and
a latch circuit including a first transistor and a second transistor which are electrically connected to each other, wherein the first transistor is electrically connected to the first terminal of the first switching member, and the second transistor is electrically connected to the control terminal of the first switching member;
wherein, when a trigger voltage is provided to the second transistor, the second transistor and the first switching member are conducted to make the first transistor conductive;
after the first transistor becoming conductive, the first transistor provides electricity to the second transistor, which keeps the second transistor conductive.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/465,100Filed 21 Aug 2014
Priority: TW 102133500 A16 Sep 2013
Published: US 2015/0077171 A119 Mar 2015
Granted: 7 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H03K 17/663
Each output circuit comprising more than one controlled bipolar transistor: using complementary bipolar transistors
H03K 17/60
By the use, as active elements, of semiconductor devices: the devices being bipolar transistors
H03K 17/68
The devices being bipolar transistors: specially adapted for switching AC currents or voltages
H03K 2217/0009
Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00: aC switches, i.e.…