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INDONESIA
Jurnal Teknik Elektro
Published by Universitas Trisakti
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering
Arjuna Subject : -
Articles 81 Documents
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PENGARUH BENTUK PROFIL GERMANIUM PADA FREKUENSI CUTOFF HBT SIGE Julian, Engeline Shintadewi
Jurnal Teknik Elektro Vol 3, No 1 (2003)
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Abstract

The effects of different shape of germanium profiles in the base to the cutoff frequency ofSi/SiGe/Si HBTs are analyzed. The shapes of germanium profile in the base are triangles. Inthe simulations, the effect of bandgap narrowing due to the addition of germanium in thebase of the HBT is included. The simulations are done with BIPOLE3V4.2.3.E. The resultsshows that Ge profiles in the base have influence in the maximum cutoff frequency of theHBTs.Keywords: SiGe, HBT, hetero junction bipolar transistor, frequency cutoff
PERANCANGAN RANGKAIAN PENGATUR LAMPU LALU LINTAS PADA BERBAGAI PERSIMPANGAN JALAN Rahardjo T.S., Kuat
Jurnal Teknik Elektro Vol 6, No 1 (2006)
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Much method to create a traffic light controller circuit, only depend on the component usedto build the circuit. But choosing the component depend on facilities to bee added to makethe driver satisfy through the street cross. In this article discuss five type off componentusually used, with more and less in every type off component.Keyword: Trafic light, controller, time sequence.
PROTEKSI PETIR PADA TRANSISI SALURAN UDARA DAN BAWAH TANAH TEGANGAN MENENGAH 20 kV Irianto, Chaerul Gagarin; Abduh, Syamsir
Jurnal Teknik Elektro Vol 2, No 2 (2003)
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This paper summarizes the main results of a study aimed at determining the maximumlightning overvoltages in branchless underground feeder protected by metal-oxide arresters.The study has two parts. Initially, it is performed assuming an ideal behavior of allcomponents: the goal is to gain insight into the physical phenomenon. This will be useful tounderstand the main results obtained in the second part, where an advanced model is usedfor representing arresters.Keywords: Lightning, Surge Arresters, Underground Cables
PROFIL GERMANIUM SEGIEMPAT PADA TRANSISTOR BIPOLAR SILIKON-GERMANIUM Julian, Engeline Shintadewi
Jurnal Teknik Elektro Vol 1, No 2 (2002)
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This paper presents a study of the effect of different starting edges position in the base ofSi/SiGe/Si HBTs. The germanium profile in the base under study is rectangular. In thesimulations, the effect of band gap narrowing due to heavy doping and band gap narrowingdue to the addition of germanium in the base of the HBT are included. The simulations aredone with BIPOLE3. The results show that the starting edge positions have strong influence inthe current gain and maximum transit frequency of the HBTsKeywords: SiGe, HBT, band gap narrowing, Bipole 3.
PERANCANGAN PROTOTYPE SISTEM PENGENDALI LAMPU LALU LINTAS PADA MODEL SIMPANG EMPAT Rahardjo T.S., Kuat; Juana, Endang; Suwatri, Hilman
Jurnal Teknik Elektro Vol 9, No 1 (2009)
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This paper describes the prototype design of traffic lights controller for several intersection model which in this paper is implemented for a 4 intersections model. This prototype is using MCS51 Microcontroller Family to control the 4 intersection traffic lights lighting sequence. In this prototype the duration of the lighting sequence are adjustable to cater for different timing need of an intersection. To be able to cater for different intersections there are supporting component needed such as Keypad and LCD for for setting up timing sequence; SEEPROM for storing in setting data and duration for each timer; Decoder as an expander output port for lighting up the traffic lights and 7-segment as the indicator of remainder of duration of time in one direction before change of light. All process is supported by software implemented in Assembly Language.Keywords: microcontroller, timer, traffic lights
ANALISIS UNJUK KERJA KOMPUTASI DISTRIBUTED SHARED MEMORY PADA SISTEM CLUSTER KOMPUTER PERSONAL Gozali, Ferrianto; Lagusto, Dimas
Jurnal Teknik Elektro Vol 4, No 2 (2005)
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Parallel processing systems that support the shared memory abstraction are becomingwidely accepted in many areas of computing. The shared memory or single system image ofaddress space abstraction provides several advantages over the message passingabstraction. Distributed shared memory or DSM is a memory configuration system that canbe used to provide a coherent shared address space for a workstation clusters or looselycoupled systems which have no support for shared memory in hardware.The purpose of thispaper is to describe issues related to the implementation of DSM in Personal ComputerCluster system. The system is developed under Linux operating system and clustermiddleware Parallel Virtual Machine [PVM]. In this research, an object-based DistributedShared Memory (DSM) system called Adsmith is used on the top of PVM. An applicationprogram for A Traveling Salesman Problem (TSP) is tested using different scenarios to getaverage execution time and speedup of the computation. Each scenario represents a differentnumber of node cluster involved for computation. The results show that programs developedwith Adsmith can achieve better performance comparable to that developed with PVM inhigh computation environment.Keywords: Distributed Shared Memory, komputer cluster, Parallel Virtual Machine,Adsmith.
MENGURANGI HARMONISA PADA TRANSFORMATOR 3 FASA Irianto, Chaerul Gagarin; Sukmawidjaja, Maula; Wisnu, Aditya
Jurnal Teknik Elektro Vol 7, No 2 (2008)
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Consumption of the electronic devices has been increase in the late of twenty years recentlyand it will cause the problem which had been unexpected before. It will cause non sinusoidalcurrent, although it is supplied by sinusoidal voltage source. This current will interfere thehigh frequent component at power system distribution grid and then it called ”harmoniccurrent”. The harmonic current can cause a lot of trouble to the consumer even powerprovider as well. High cost operation, short lifetime any equipment as the most disadvantageif the harmonic current appear on electric power distribution system. There are manymethod to reduce the harmonic distortion. This papert will explain the use of Z transformerwith resonance arm filter to reduce harmonic distortion on the system.Keywords: Harmonic current, threephase transformer, Z transfor
ANALISIS PERFORMANSI IMPLEMENTASI COMBAT DI SPV PURWAKARTA Rofiq, M. Ainur
Jurnal Teknik Elektro Vol 3, No 2 (2004)
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One of way to solve coverage problem for the time being is place a combat as new site.Before and after implemented, Compact Mobile Base Station (Combat) need to analyzeperformance using simulation software and the the reality of data in the field. This journalwill describe analyze performance in the SPV Purwakarta Factory area, which known asbeing area coverage problems. Place combat in SPV area with BTS Ciseureuh as BTS farend and use the RFS celwafe 90 antenna so the performance of signal quality will beappropriate as standard well establishedKeynote: coverage, signal strength, line of sight
ANTENA MIKROSTRIP BENTUK SEGIEMPAT Surjati, Indra
Jurnal Teknik Elektro Vol 1, No 1 (2001)
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Patch antenna are popular for their well known attractive features, such as low profile,light weight and compatibility with monolithic microwave integrated circuits (MMIC) andmicrowave integrated circuits ( MIC ). There are many various shapes of patch antennas,such as rectangular, circular, square, triangular and ring. The simple shape isrectangular patch antenna and this paper will discuss about the rectangular patchantennaKeywords: feeding, coupling.
SIMULASI FILTER SALLEN KEY DENGAN SOFTWARE PSPICE Prawiroredjo, Kiki
Jurnal Teknik Elektro Vol 6, No 2 (2007)
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Abstract

A Sallen–Key filter is a type of active filter, particularly valued for its simplicity. The circuitproduces a 2-pole (12 dB/octave) lowpass or highpass response using two resistors, twocapacitors and a buffer amplifier or operational amplifier. By varying the gain of theamplifier the filter will have a certain type of frequency response such as Bessel, Butterworthor Chebyshev. Higher-order filters can be obtained by cascading two or more stages. Thisfilter topology is also known as a voltage controlled voltage source (VCVS) filter. The opampprovides buffering between filter stages, so that each stage can be designedindependently. PSpice software can be used to simulate the filter circuits and the frequencyresponse can be analyzed before the circuits are built. Designers can change the frequencyresponse easily by changing the values of the components in the filter design by PSpicesoftware. The results of the simulation show that the Bessel response has the lowest outputvoltage and the lowest roll-off, Butterworth frequency response has higher output voltagethan Bessel and as the most stable one but Chebyshev response has the highest outputvoltage and the highest roll-off but not stable.Keywords: Sallen-Key filter, PSpice software, frequency response, lowpass filter, highpassfilter, Operational Amplifier, Bessel, Butterworth, Chebyshev.

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