Abstract:
A distributed transmission line transformer using additional pads for bond wire coupling is provided to minimize a decrease in a coupling coefficient and prevent deterioration in the total output power and efficiency of a power amplifier by using additional dummy pads in connecting an off-chip distributed transmission line transformer with an integrated circuit. In a distributed transmission line transformer(230), of which the primary and secondary transmission lines(231,232) are formed separately from a differential power amplifier(210) on a PCB substrate(310), the differential power amplifier(210), of which the output block is finalized as output pads(211), comprises two additional dummy pads(212). The PCB substrate(310) comprises two transformer pads(240a,240b) formed in the vicinity of the differential power amplifier(210). The primary transmission line(231) of the distributed transmission line transformer(230) is connected with the output pads(211) of the differential power amplifier(210) by wire bonding. The secondary transmission line(232) is connected to the transformer pads(240a,240b) via the dummy pads(212).
Abstract:
A radar apparatus having a transmission leakage current canceller is provided to constrain the reduction of receiving intensity and a noise index of a receiving stage by using the transmission signal canceller without loss of transmission power. A radar apparatus having a transmission leakage current canceller includes a signal generator(101), a front coupler block(303), two intermediate coupler blocks(302), a rear coupler block(304), a leakage current canceller(301), a power divider(102) and two mixers(106). The front coupler block(303) divides a transmission signal generated from the signal generator(101) into two signals having the same amplitude and a phase difference of 90 degrees. The intermediate coupler blocks(302) receive the transmission signal from the front coupler block(101) and generate a quadrature signal. The intermediate coupler blocks(302) receive a receiving signal and generate a transmission leakage signal. The rear coupler block(304) receives the transmission signal having the phase difference of 90 degrees from the intermediate coupler blocks(302), and transmits the transmission signal to an antenna without loss. The rear coupler block(304) outputs the received signal having the phase difference of 90 degrees and the same amplitude to the intermediate coupler blocks(302). The leakage signal canceller(301) removes the transmission leakage signal and adds the received signal. The power divider(102) receives the signal outputted from the leakage signal canceller(301), and divides the received signal into two same signals. The mixers(106) perform quadrature mixing based on an LO signal outputted from the intermediate coupler block(302) and the signal outputted from the power divider(102).
Abstract:
A PCB(Printed Circuit Board) distributed transmission line transformer for a voltage combining method is provided to be formed on a PCB instead of being formed as an IC(Integrated Circuit) on a semiconductor substrate, thereby obtaining high Q-factors while length of the transmission line gets bigger. A primary transmission line(231) and a secondary transmission line(232) are formed on a PCB(310). Both ends of the primary transmission line(231) are connected to an amplification stage(210) having differential input as active elements on the PCB(310). Connection between the primary transmission line(231) and the amplification stage(210) is carried out through wire bonding processes(231a).
Abstract:
본 발명은 양자구조 적외선 수광소자에 관한 것으로서, 다이오드 형태의 양자구조 적외선 수광소자가 아닌, 양자우물이나 양자점과 헴트(HEMT ; High Electron Mobility Transistor)를 결합한 양자구조의 적외선 수광소자를 형성하여 높은 광전류를 가지고 CMOS 스위치 없이 수광소자 자체로 스위칭이 가능하며 수광소자 자체를 트랜지스터로서 ROIC(Read Out Integrated Circuit) 제작에 이용할 수 있도록 할 뿐만 아니라 게이트 금속 형태를 빗살 형태의 회절격자 형식으로 형성하여 적외선이 여러 방향으로 입사되도록 함으로써 양자 효율을 높일 수 있도록 한 것이다. QWIP, QDIP, QSIP, FPAs, 적외선 센서, 적외선 영상, HEMT, 양자효율
Abstract:
본 발명은 밸런스 구조를 이용한 레이더 시스템에 관한 것으로서, 밸런스 구조를 이용하여 송신단의 누설 신호를 서로 상쇄시켜 수신감도를 높일 뿐만 아니라 수신기가 송신단의 큰 누설신호에 의해 포화되는 것을 막을 수 있고 수신단이 송신단의 누설전력으로 인해 잡음지수가 높아지는 것을 막으며 송수신 안테나를 공유할 수 있어 레이더 시스템의 초소형, 고감도 특성을 동시에 얻을 수 있는 이점이 있다. 레이더, 밸런스 구조, 누설신호, 초소형, 고감도, 적응형 레이더, 수신감도
Abstract:
PURPOSE: An LC resonating voltage control push-push oscillator by using a differential form is provided to generate an f0 frequency having a low phase noise in a push-push method by utilizing two output signals of the LC resonating voltage control oscillator to generate a signal having an f/2 and a phase difference of 180°. CONSTITUTION: An LC resonating voltage control push-push oscillator by using a differential form includes a differential amplifier(10) for implementing a voice resistance, an LC resonator(20) connected to an inductor and a condenser in symmetric with each differential output terminals of the differential amplifier(10), an output buffer(30) connected to each differential output terminals of the differential amplifier(10) in symmetrical for outputting a harmonic component to a common output terminal by receiving an output value and a current supply(40) for supplying the current supplied to the differential amplifier(10) and the output buffer(30) by variably controlling in response to the control voltage.
Abstract:
PURPOSE: A device for sensing a long wavelength infrared ray having a quantum structure coupled to a camel hump diode is provided to increase sensitivity of an infrared sensing device, by integrating the quantum structure in a light absorption region of the camel hump diode. CONSTITUTION: The camel hump diode has a source layer(1), a gate layer(2) and a drain layer(3). The infrared sensing device is composed of quantum dots integrated in the drain layer which is the light absorption region of the camel hump diode, so that charges in a potential barrier layer(4) are reduced by absorbed light to amplify photocurrent.
Abstract:
PURPOSE: A heterojunction bipolar transistor and a fabricating method thereof are provided to increase a breakdown voltage between a base and a collector by forming a concave groove on a surface of a collector layer. CONSTITUTION: An N type collector layer(120) is formed on a part of a surface of a semi-insulating substrate(110) formed with GaAs. A P+ type base layer is formed on a center of a surface of the N type collector layer(120). A collector electrode(125) is formed on an edge of the collector layer(120). An emitter layer(140) and an emitter contact layer(145) are formed on a center of a base layer. A base electrode(135) is formed on an edge of the base layer(130). A concave groove(A) is formed on a surface of the collector layer(120) between the base layer(130) and the collector electrode(125). A path of current is determined by a depth of the concave groove(A). An interval between the base layer(140) and the collector electrode(125) can be increased regardless of a thickness of the collector layer(120).
Abstract:
본 발명은 다중양자우물(multiple quantum well) 수직입사 적외선 탐지소자(infrared photodetector) 및 그의 제조방법에 관한 것이다. 본 발명의 적외선 탐지소자는 상면에 이방성 경사면이 형성된 기판; 전기 기판의 이방성 경사면 상에 형성되며 수직입사된 빛을 탐지하기 위하여 표면 내부가 하향으로 경사지도록 형성된 다중양자우물; 전기 다중양자우물의 상단과 하단에 형성되어 접지전극과 감지전극을 부설하기 위한 접지층 및 감지층; 및, 전기 접지층 및 감지층 각각에 부착 형성되어 다중양자우물에서의 탐지된 결과를 외부로 전달하기 위한 접지전극 및 감지전극을 포함하며, 본 발명에 의한 다중양자우물 수직입사 적외선 탐지장치는 별도의 부대장치가 필요없이 적외선 탐자소자면에 대해 수직입사되는 빛을 효율적이고 감도높게 탐지할 수 있으며, 본 발명에 의해 적외선 탐지소자를 경제적으로 제조할 수 있다는 것이 확인되었다.
Abstract:
본 발명은 실리콘 기판의 상부에 소정 두께의 실리콘 산화막이 형성되어 있으며 실리콘 산화막의 내부에 제1 전도성 물질의 이온 주입으로 인해 전자의 포획가능한 소정크기를 갖는 다수개의 나노 크리스탈들이 형성되어 있는 반도체 소자를 제공하고 그에 따라 미소부분에 국부적으로 전계를 걸어 줄 수 있는 AFM 팁을 상기 반도체 소자의 소정 높이에 위치시키는 제 1 단계와, 제 1 과정을 통하여 소정의 높이를 유지하는 상태에서 AFM 팁에 특정 임계전압 이상의 전압을 걸어주어 AFM 팁 아래 의 특정부분에 전기적 필드를 형성되는 제 2 단계와, 제 2 단계를 통하여 형성된 전기적 필드에 의하여 실리콘 산화막 내부에 형성되어 있는 나노 크리스탈에 실리콘 기판으로부터 발생된 자유전자가 포획되는 제 3 단계를 포함하는 것을 특징으로 하는 다수개의 나� �� 크리스탈들이 형성되어 있는 반도체 소자를 이용한 데이터 저장 방법을 제공한다.