专利检索_ .放大级负载中的电流由圆环感测专利检索_ .放大级负载中的电流由圆环感测专利检索查询

序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
1	Rf power transistor secondary breakdown protection circuit	US3784877D	1972-06-05	US3784877A	1974-01-08	COWELL D
A protection circuit for RF power transistors to prevent secondary breakdown includes gate means to monitor both the collector current and collector voltage. A gate pulse generated each time the collector voltage exceeds a preset value is used to gate a wave form derived from the transistor collector current. When the current wave form is in phase with the gate pulse and is of sufficient amplitude, the gate means provides a controlled voltage to bias off the transistor power supply for purposes of reducing the output power to safe operating levels.
2	Adaptive impedance mismatch detector system	US800832	1985-11-22	US4647871A	1987-03-03	Harvey N. Turner, Jr.
An adaptive impedance mismatch detector system is provided for determining whether or not a particular load impedance is matched or mismatched to the characteristic impedance of a transmission line. The detector system is capable of determining if a particular load impedance has a value outside of an impedance threshold circle having a center at a location other than at the center of the Smith Chart. The system changes the radius and/or center of the threshold circle in response to changes in circuit operating conditions or parameters. This flexibility enables the detector to be more selective in determining improper load conditions.
3	JPS63501447A -	JP50618186	1986-11-14	JPS63501447A	1988-06-02

4	Adaptation imped- - dance mismatch detector system	JP50618186	1986-11-14	JPH0827309B2	1996-03-21	TAANAA HAABEI NOORAN JUNIA

5	ADAPTIVE IMPEDANCE MISMATCH DETECTOR SYSTEM.	EP86907199	1986-11-14	EP0247157A4	1988-04-18	TURNER HARVEY NOLAN JR
An adaptive impedance mismatch detector system (10) for determining whether or not a particular load impedance (30) is matched or mismatched to the characteristic impedance of a transmission line (at 20). The detector system is capable of determining if a particular load impedance has a value outside of an impedance threshold circle (24) having a center (22) at a location other than at the center of the Smith Chart (Fig. 2). The system changes the radius and/or center of the threshold circle in response to changes in circuit operating conditions or parameters. This flexibility enables the detector to be more selective in determining improper load conditions.
6	ADAPTIVE IMPEDANCE MISMATCH DETECTOR SYSTEM	EP86907199.0	1986-11-14	EP0247157A1	1987-12-02	TURNER, Harvey, Nolan, Jr.
Un système détecteur d'inadaptations d'impédance adaptatif (10) permet de déterminer si une impédance de charge particulière (30) est adaptée ou inadaptée à l'impédance caratéristique d'une ligne de transmission (20). Le système détecteur est capable de déterminer si une impédance de charge particulière possède une valeur extérieure à un cercle de seuil d'impédance (24) ayant un centre (22) à un emplacement autre que le centre du diagramme de Smith (Fig. 2). Le sytème modifie le rayon et/ou le centre du cercle de seuil en réponse aux modifications des conditions ou paramètres de fonctionnement du circuit. Cette flexibilité permet au détecteur d'être plus sélectif dans la détermination de conditions de charge inappropriées.

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