TW200943726A - Signal modulation device and control method thereof - Google Patents

Signal modulation device and control method thereof

Info

Publication number
TW200943726A
TW200943726A TW97112963A TW97112963A TW200943726A TW 200943726 A TW200943726 A TW 200943726A TW 97112963 A TW97112963 A TW 97112963A TW 97112963 A TW97112963 A TW 97112963A TW 200943726 A TW200943726 A TW 200943726A
Authority
TW
Taiwan
Prior art keywords
module
pwm
signal
switch
feedback
Prior art date
Application number
TW97112963A
Other languages
Chinese (zh)
Inventor
Chun-Wei Hsu
Original Assignee
Mobile Devices Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mobile Devices Inc filed Critical Mobile Devices Inc
Priority to TW97112963A priority Critical patent/TW200943726A/en
Publication of TW200943726A publication Critical patent/TW200943726A/en

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  • Dc-Dc Converters (AREA)
  • Amplifiers (AREA)

Abstract

A signal modulation device includes a pulse width modulation (PWM) module, a control module, a switch module and a feedback module. The PWM module receives a data signal and generates a first PWM signal and a second PWM signal in accordance with the data signal and a feedback signal. The control module is electrically connected to the PWM module and generates a first and a second switch control signals in accordance with the first and the second PWM signals. The switch module is electrically connected to the control module and outputs a driving signal, in accordance with the first and the second switch control signals, for driving a load. The feedback module is electrically connected to the PWM module, the control module and the switch module. The feedback module generates a feedback signal to the PWM module in accordance with a switch state of the switch module.
TW97112963A 2008-04-10 2008-04-10 Signal modulation device and control method thereof TW200943726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW97112963A TW200943726A (en) 2008-04-10 2008-04-10 Signal modulation device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW97112963A TW200943726A (en) 2008-04-10 2008-04-10 Signal modulation device and control method thereof

Publications (1)

Publication Number Publication Date
TW200943726A true TW200943726A (en) 2009-10-16

Family

ID=44869092

Family Applications (1)

Application Number Title Priority Date Filing Date
TW97112963A TW200943726A (en) 2008-04-10 2008-04-10 Signal modulation device and control method thereof

Country Status (1)

Country Link
TW (1) TW200943726A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI407687B (en) * 2010-05-25 2013-09-01 Elite Semiconductor Esmt Method for switching an audio amplifier between ternary modulation and quaternary modulation
TWI584579B (en) * 2015-04-24 2017-05-21 晶豪科技股份有限公司 Modulation selecting circuit of audio amplifier and method thereof
CN107306117A (en) * 2016-04-22 2017-10-31 晶豪科技股份有限公司 Quaternary/ternary modulation selection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI407687B (en) * 2010-05-25 2013-09-01 Elite Semiconductor Esmt Method for switching an audio amplifier between ternary modulation and quaternary modulation
TWI584579B (en) * 2015-04-24 2017-05-21 晶豪科技股份有限公司 Modulation selecting circuit of audio amplifier and method thereof
CN107306117A (en) * 2016-04-22 2017-10-31 晶豪科技股份有限公司 Quaternary/ternary modulation selection circuit

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