VOLTAGE PROTECTION CIRCUIT TO PREVENT POWER AMPLIFIER BURNOUT, AND ELECTRONIC DEVICE HAVING THE SAME

Title:

VOLTAGE PROTECTION CIRCUIT TO PREVENT POWER AMPLIFIER BURNOUT, AND ELECTRONIC DEVICE HAVING THE SAME

Document Type and Number:

WIPO Patent Application WO/2020/204499

Kind Code:

A1

Abstract:

Disclosed is a voltage protection circuit for preventing power amplifier burnout in an electronic device. The electronic device includes a power amplifier (PA) configured to amplify a transmission signal, a switch configured to set a path of a signal outputted from the PA, a bias control circuit configured to control the supply of a bias current driving the PA, and a voltage protection circuit configured to provide a main control signal for turning off the PA earlier than turning off the switch based on a battery voltage providing a driving power of the electronic device, and forward the main control signal to the bias control circuit, wherein, in response to receiving the main control signal instructing to turn off the PA from the voltage protection circuit, the bias control unit stops the supply of the bias current driving the PA.

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Inventors:

CHOI HYUNSEOK (KR)
KIM JOOSEUNG (KR)
CHO NAMJUN (KR)
NA HYOSEOK (KR)

Application Number:

PCT/KR2020/004234

Publication Date:

October 08, 2020

Filing Date:

March 27, 2020

Export Citation:

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Assignee:

SAMSUNG ELECTRONICS CO LTD (KR)

International Classes:

H03F1/52; H02H3/20; H02H3/24; H03F1/56; H03F3/21

Foreign References:

US20100120475A1	2010-05-13
US20160261239A1	2016-09-08
KR100813909B1	2008-03-18
US20130113570A1	2013-05-09
KR20170019710A	2017-02-22
US20090309663A1	2009-12-17
US20110095826A1	2011-04-28
US20110292554A1	2011-12-01
CN104579191A	2015-04-29
US8421540B1	2013-04-16

Other References: