Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020069191 - AUDIO AMPLIFIER WITH INTEGRATED FILTER

Publication Number WO/2020/069191
Publication Date 02.04.2020
International Application No. PCT/US2019/053255
International Filing Date 26.09.2019
IPC
H03F 1/00 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F 1/02 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F 1/08 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
08Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
H03F 1/26 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
26Modifications of amplifiers to reduce influence of noise generated by amplifying elements
H03F 1/32 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
H03F 1/34 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
34Negative-feedback-circuit arrangements with or without positive feedback
CPC
H03F 3/183
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
181Low frequency amplifiers, e.g. audio preamplifiers
183with semiconductor devices only
H03F 3/45071
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
45Differential amplifiers
45071with semiconductor devices only
H03G 3/30
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
GCONTROL OF AMPLIFICATION
3Gain control in amplifiers or frequency changers ; without distortion of the input signal
20Automatic control
30in amplifiers having semiconductor devices
H03H 7/0138
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
7Multiple-port networks comprising only passive electrical elements as network components
01Frequency selective two-port networks
0138Electrical filters or coupling circuits
H03M 1/66
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
66Digital/analogue converters
Applicants
  • THX LTD. [US]/[US]
Inventors
  • JONES, Owen
Agents
  • PARKER, Wesley E.
  • AUYEUNG, Al
  • BERNADICOU, Michael A.
  • BLAIR, Steven R.
  • BLANK, Eric S.
  • BRADLEY, Karri Kuenzil
  • BRASK, Justin K.
  • COFIELD, Michael A.
  • FORD, Stephen S.
  • GRISWOLD, Ian J.
  • HEUSER, Peter E.
  • LEGAARD, Brenna K.
  • MAKI, Nathan R.
  • PREWITT, Steven J.
  • RASKIN, Vladimir
  • ROJO, Estiven
  • STRAUSS, Ryan N.
  • SULLIVAN, Stephen
  • TERMES, Lance
  • WANG, Yuke
  • WARD, Jonathan M.
  • YATES, Steven D.
Priority Data
62/737,67427.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AUDIO AMPLIFIER WITH INTEGRATED FILTER
(FR) AMPLIFICATEUR AUDIO À FILTRE INTÉGRÉ
Abstract
(EN)
Embodiments provide an audio amplifier circuit with integrated (built-in) filter (e.g., a digital-to-analog converter (DAC) filter). The audio amplifier circuit may have a non-flat (e.g., low-pass) closed loop frequency response. The audio amplifier circuit may include a low pass filter coupled between an input terminal that receives the input analog audio signal and the input of the gain stage of the amplifier. In some embodiments, additional impedance networks may be included to produce a desired low-pass filter response, such as a second order filter, a third order filter, and/or another suitable filter response. Other embodiments may be described and/or claimed.
(FR)
Des modes de réalisation concernent un circuit amplificateur audio avec un filtre intégré (par exemple, un filtre convertisseur numérique-analogique (DAC)). Le circuit amplificateur audio peut avoir une réponse en fréquence en boucle fermée non plate (par exemple, passe-bas). Le circuit amplificateur audio peut comprendre un filtre passe-bas couplé entre une borne d'entrée qui reçoit le signal audio analogique d'entrée et l'entrée de l'étage de gain de l'amplificateur. Dans certains modes de réalisation, des réseaux d'impédance supplémentaires peuvent être inclus pour produire une réponse de filtre passe-bas souhaitée, telle qu'un filtre de second ordre, un filtre de troisième ordre et/ou une autre réponse de filtre appropriée. D'autres modes de réalisation peuvent être décrits et/ou revendiqués.
Latest bibliographic data on file with the International Bureau