Abstract:
In one embodiment, a method includes forming a first pad for coupling to a first terminal of a first transistor of a monolithic darlington transistor configuration and forming a second pad for coupling to a first terminal of a second transistor of the monolithic darlington transistor configuration. The method then forms a third pad for coupling to an external component for the monolithic darlington transistor configuration. The third pad is coupled to a second terminal of the first transistor and a second terminal of the second transistor of the monolithic darlington transistor configuration.
Abstract:
본 발명은 출력채널수가 감소된 다채널 검출기에 관한 것으로서 입력 신호를 선형으로 증폭하는 선형 증폭기, 선형 증폭기에 독립적인 회로로 구성되며, 내부에 연산 증폭기를 포함하고, 연산 증폭기의 증폭율에 따라 달라지는 오프셋 수준을 보정하는 오프셋 보정부, 선형 증폭기의 출력 신호의 이득을 미세하게 조절하여 입력신호의 불균일 특성을 저하시키는 균일도 보정부, 비교부 및 신호 판별부로부터 출력신호가 발생하고, 스위치 회로가 신호 판별부로부터 트리거를 받는 시점까지 균일도 보정부의 출력 신호를 지연하는 신호 지연기, 균일도 보정부의 출력 신호를 일정 레벨의 신호와 비교하는 비교부, 비교부로부터 트리거 신호를 수신하여, 이벤트가 발생한 채널인 채널 위치 정보를 판별하고, 판별된 채널위치의 스위치 회로에 트리거 신호를 전송하며, 판별된 위치정보를 출력하는 신호 판별부, 및 신호 판별부로부터 판별된 채널위치의 스위치 회로에 트리거 신호가 입력되면, 에너지 정보, 시간 정보, 또는 이벤트가 발생한 채널 위치 정보를 입력받는 채널 정보 처리부를 포함하는 것을 특징으로 하며, 이벤트가 일어난 채널 위치 정보와 에너지 정보뿐만 아니라, 클럭 발생기와 신호 판별 회로를 추가로 사용하여 시간정보까지 제공할 수 있다.
Abstract:
An amplifier circuit (1) includes an amplifying transistor (QO) and an impedance-controllable dc bias circuit (2) for biasing the amplifier transistor (QO) to obtain a conduction angle of at least about 180 DEG . The dc bias circuit (2)includes a self-bias boosting circuit having separate current sources (Ibias, Iclass) for independently controlling the output impedance of the dc bias circuit (2) and the quiescent current of the amplifier transistor (QO), and has a Wilson current-mirror (Q4, Q5, Q6, Q7) integrated with a cascode current-mirror circuit (Q2, Q3, Q8) to form an extended Wilson current-mirror circuit (Q2-Q8) having an output coupled to a control terminal of the amplifying transistor (QO) by a resistor (R1), and a capacitor (C2) coupled from the extended Wilson current-mirror circuit (Q2-Q8) to a common terminal (Gnd).
Abstract:
A fully differential, variable gain amplifier comprising an input, an intermediate stage and an output stage, the input stage (100) being coupled to the intermediate stage (200) and the intermediate stage being coupled to the output stage (300). The input stage comprises an amplifier with local feedback means and voltage-to-current conversion means. The intermediate stage has nodes that are shared by the input stage, the output stage and the intermediate stage, respectively, which are connected to the reference node via a relatively low impedance branch. The intermediate stage further comprises current controlled networks coupled to the common nodes via a first feedback branches and branches to the input stage via second feedback branches. The amplifier has means for controlling the gain and the bandwidth independently of one another.
Abstract:
A high-frequency amplifier circuit includes an amplifying transistor and a driver transistor, with the amplifying transistor being connected in either a common emitter or a common source configuration and the driver transistor being connected in a corresponding common collector or a common drain configuration, depending upon whether bipolar or field effect transistors are used. A current-mirror bias circuit is coupled between an input terminal and an output terminal of the driver transistor, with a resistor being provided for coupling the current mirror to the input terminal of the driver transistor. The resistor, which typically has a value of between about 20 and 100 ohms, provides a negative impedance cancellation effect while minimizing power consumption at low bias levels.
Abstract:
A known linear RF detector comprises a detector part having a detector diode (D1a) biased with a bias current (Ib), and a linearizer part having an operation amplifier (OA1) and a diode in its feedback path. The major drawback of the known detector concerns the output offset voltages, the values of which can be predicted only if the diodes are matched diodes and have the same temperature. Because of this, the detector part and the linearizer part cannot be placed on different circuit boards. The invention solves the problem by placing a transistor circuit (Q3a, Q2a) in the feedback path such that it generates an offset voltage at the output of the operation amplifier, the voltage being the sum of the base-emitter voltages of the transistors of the circuit. Further, a second transistor circuit (Q3b, Q2b) is arranged at the output of the operation amplifier such that it generates a voltage at the output of the operation amplifier that compensates for the sum of the base-emitter voltages of the transistor circuit. The voltages thus cancel each other and the output offset voltage of the detector is zero.