公开(公告)号：WO1988010025A1

公开(公告)日：1988-12-15

申请号：PCT/US1988001463

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUGHES AIRCRAFT COMPANY ,  HUDSPETH, Thomas ,  KAPLAN, David, S. ,  ROSEN, Harold, A.

IPC: H03F01/02

CPC classification number: H03F1/0244 ,  H03F3/2178

Abstract: A high efficiency envelope amplifier (20) is disclosed. The invention includes a power supply (24), a comparator (60), and several switches (26-38). The power supply (24) is capable of providing multiple outputs. The comparator (60) measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range, a selected power supply output is switched onto the output path. Since the present invention incrementally switches small amounts of power, switching losses are substantially mitigated.

公开(公告)号：EP0316405B1

公开(公告)日：1993-03-24

申请号：EP88904831.0

申请日：1988-05-06

Applicant: Hughes Aircraft Company

Inventor： HUDSPETH, Thomas ,  KAPLAN, David, S. ,  ROSEN, Harold, A.

IPC: H03F1/02 ,  H03F3/217

CPC classification number: H03F1/0244 ,  H03F3/2178

Abstract: A high efficiency envelope amplifier (20) is disclosed. The invention includes a power supply (24), a comparator (60), and several switches (26-38). The power supply (24) is capable of providing multiple outputs. The comparator (60) measures the amplitude of an input signal against one of several threshold levels. When the input signal is within a predetermined range, a selected power supply output is switched onto the output path. Since the present invention incrementally switches small amounts of power, switching losses are substantially mitigated.

公开(公告)号：EP0316405A1

公开(公告)日：1989-05-24

申请号：EP88904831.0

申请日：1988-05-06

Applicant: HUGHES AIRCRAFT COMPANY

Inventor： HUDSPETH, Thomas ,  KAPLAN, David, S. ,  ROSEN, Harold, A.

IPC: H03F1 ,  H03F3

CPC classification number: H03F1/0244 ,  H03F3/2178

Abstract: Un amplificateur d'enveloppe à rendement élevé (20) comporte une alimentation électrique (24), un comparateur (60), et plusieurs commutateurs (26-38). L'alimentation électrique (24) peut fournir de multiples sorties. Le comparateur (60) mesure l'amplitude d'un signal d'entrée par rapport à un parmi plusieurs niveaux de seuil. Lorsque le signal d'entrée se situe dans une plage prédéterminée, une sortie sélectionnée d'alimentation électrique est commutée sur le cheminement de sortie. La présente invention permettant la commutation incrémentielle de faibles quantités de puissance, les pertes de commutation sont sensiblement atténuées.