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1. (WO1997018626) SMALL SIGNAL LINEARIZATION IN POWER SWITCHING AMPLIFIERS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/018626 International Application No.: PCT/US1996/017650
Publication Date: 22.05.1997 International Filing Date: 31.10.1996
Chapter 2 Demand Filed: 09.06.1997
IPC:
H03F 1/32 (2006.01) ,H03F 3/217 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
1
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32
Modifications of amplifiers to reduce non-linear distortion
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
3
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20
Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21
with semiconductor devices only
217
Class D power amplifiers; Switching amplifiers
Applicants:
APOGEE TECHNOLOGY, INC. [US/US]; 920 Providence Highway Norwood, MA 02062, US
Inventors:
ADRIAN, Andrew, Armen; US
DANIELSON, Michael, Stephen; US
MEYERS, David, Barrett; US
SPIEGEL, Leo; US
Agent:
MICHAELIS, Brian, L. ; Dike, Bronstein, Roberts & Cushman, L.L.P. 130 Water Street Boston, MA 02109, US
Priority Data:
08/556,61513.11.1995US
Title (EN) SMALL SIGNAL LINEARIZATION IN POWER SWITCHING AMPLIFIERS
(FR) LINEARISATION DES PETITS SIGNAUX DANS LES AMPLIFICATEURS DE COMMUTATION D'ALIMENTATION
Abstract:
(EN) An all digital switching amplifier includes an input over-sampling filter (20) for receiving a pulse code modulated (PCM) digital input signal. Oversampled PCM data are supplied to a multibit noise shaper (22), which frequency shapes quantization error. The oversampled, noise-shaped, PCM data is applied to an amplitude-to-time converter (24), which produces variable-width command pulses. The command pulses from converter (24) are applied to switch drive logic circuit (28) to enable switches (26) to connect a filter (30) and load (32) to power supply (34).
(FR) Un amplificateur de commutation entièrement numérique comprend un filtre d'entrée suréchantillonneur (20) permettant de recevoir un signal d'entrée numérique à modulation par codage d'impulsions (PCM). Les données PCM suréchantillonnées sont transmises à un conformateur de bruit multibit (22), qui conforme en fréquence l'erreur de quantification. Les données PCM suréchantillonnées et à conformation de bruit sont transmises à un convertisseur amplitude-temps (24), qui produit des impulsions de commande de largeur variable. Celles-ci sont transmises par le convertisseur (24) à un circuit logique de commande de commutation (28), ce qui permet aux commutateurs (26) de relier un filtre (30) et une charge (32) à une alimentation (34).
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0861520JP4212647 JP2000500625CA2237633AU1996076051