Title:
CLASS-D AMPLIFIER WITH DUTY CYCLE CONTROL
Document Type and Number:
WIPO Patent Application WO/2019/100246
Kind Code:
A1
Abstract:
A class-D amplifier (100) includes an output driver (108), a pulse width modulator (106), an integrator (104), and duty cycle control circuitry (102). The output driver (108) is configured to drive a loudspeaker. The pulse width modulator (106) is coupled to the output driver (108). The integrator (104) is coupled to the pulse width modulator (106). The duty cycle control circuitry (102) is coupled to the integrator (104). The duty cycle control circuitry (102) is configured to monitor amplitude of output signal of the integrator (104), and change an average duty cycle of signal at an output of the output driver (108) as a function of the amplitude.
Inventors:
LIAO JIANQUAN (CN)
WANG XIUYUAN (CN)
WANG XIUYUAN (CN)
Application Number:
PCT/CN2017/112301
Publication Date:
May 31, 2019
Filing Date:
November 22, 2017
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC (US)
TEXAS INSTRUMENTS JAPAN LTD (JP)
TEXAS INSTRUMENTS JAPAN LTD (JP)
International Classes:
H03F3/217
Foreign References:
| US20090315623A1 | 2009-12-24 | |||
| US7170266B1 | 2007-01-30 | |||
| US20140285258A1 | 2014-09-25 |
Other References:
See also references of EP 3714543A4
Attorney, Agent or Firm:
JEEKAI & PARTNERS (CN)
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