某公司招聘的题目

    技术2022-05-11  82

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    Technical Tasks – Electrical Engineering Analog ...   Low signal AC-amplifier by use of a single transistor.a) draw a simple circuit diagram b) describe whether your solution is non-phase-shifting or phase shifting. c) describe whether your solution is mainly an impedance converter or voltage amplifier.   Non-inverting DC-amplifier using an OP-Amp.a) draw a simple circuit diagram b) calculate the amplification factor c) is the input impedance “high” or “low” or “depending on the selected resistors” ?   AC/DC power supply- draw a simple circuit for a AC/DC power supply (either with conventional transformer or a switching power supply),Resistor Color CodingWrite the color code (5-ring-code) of a 46.4 K-Ohm resistor with 1% tolerance. Capacitor CodingWhat numerical code is printed on a 0.1 µF capacitor? Digital ...   Micro-ControllerSketch a block diagram of a (minimal) Micro-Controller including its main interfaces.Logic DevicesDraw the logic symbol and the logic table of a NAND and an OR digital logic device.What is a NMI?Describe briefly its function.What is a PLD? Main advantages and disadvantage?  Answer Sheet (Electrical Engineering)   Name: Vincent 1: Low signal AC-amplifier by use of a single transistor. a)   b) My solution is a -180 degrees phase shifting circuit.   c) My solution is mainly an voltage amplifier ,which with a –180 degrees phase shifting.   2: Non-inverting DC-amplifier using an OP-Amp. a)   b) Assuming that R1=R3,R4=R5,R6=R7,Vin+ and Vin- referenced to VCC/2, amplification factor is equal to R6/R4(1+2R1/R2)   c) Input impedance is extremely “High” in this circuit.   3: AC/DC power supply     4: Resistor Color Coding Yellow Blue Yellow Red Brown   5: Capacitor Coding     104   6: Micro-Controller   7: Logic Devices   NAND

      0 1 0 1 1 1 1 0

          OR  

      0 1 0 0 1 1 1 1

      8: What is a NMI?        Non-maskable Interrupt : a high-priority interrupt that cannot be disabled by another interrupt. It is used to report malfunctions such as parity, bus and math coprocessor errors. Moreover,The NMI signal is normally used only for critical problem situations, such as serious hardware errors   9: What is a PLD?        The main advantages of PLD-s, which comprise the key value proposition for these products, include faster time to market due to a shorter design cycle, smooth product upgrades and therefore lower investment risk. The disadvantage is that because of the need to be programmable, PLD-s must include extra circuitry in addition to what is necessary to perform a specific function. This results in increased die sizes and hence - higher manufacturing cost per unit.

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