LM LM – Transistor Array, Package: Soic Narrow, Pin Nb= The LM consists of five general purpose silicon NPN transistors on a common. The LM consists of five general purpose silicon NPN transistors on a common monolithic substrate. Two of the transistors are internally connected to form a. Part Number: LM, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor.

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The figure illustrates a Just a different manufacturer. Keep track of the divider ratio you finally use to scale your measurement correctly.

And for those of you with an internship this summer should be aware of the corporate and university management structure. From a practical viewpoint, if the input signals are noisy because of low amplitudes, you may choose to use an input voltage divider to provide “cleaner” waveforms. Set up the circuit in Figure 1 using Q1 and Q2 for the emitter-coupled pair.

A written report is not required. Above and beyond CS1, the following provides an important understanding of computer technology hardware. Use a low frequency sinusoid or triangular wave as the input. You will not need an input voltage divider because the Acm is low, Figure 3, because the common-mode voltage gain is sufficiently low that you will have to increase the input level significantly above what you used in the differential-mode measurement.


The amplitude of the input must be large enough to drive the input through the entire desired range of operation.

We will jointly review your notebook during the 12 December laboratory period with the expectation that this experiment will be included. Prepare a circuit diagram ratasheet how you are measuring the common-mode voltage gain. Lead dress and length is also important. The CA is the same electrically as the LM The data sheet is dstasheet on the class WEB page. Pay particular attention to V OD. Consider implementing the The signal generators have a mV minimum. Include the effect of a non-infinite Early voltage to improve your analysis and simulation accuracy.

LM 데이터시트(PDF) – National Semiconductor (TI)

That is do not use the Set up your input signals, use 1 kHz, so that the output is reasonably linear. Use Figure 1 and class notes for guidance to prepare a detailed circuit diagram.

Measure the all Q-point voltages and currents using the DMM. Use the oscilloscope and DMM to measure the differential-mode voltage gain.


The transfer characteristics of a circuit can be displayed using the X-Y oscilloscope inputs. Use the oscilloscope to also check for excessive noise which may translate as a noisy dc voltage measurement. Ground both the inputs of Q1 and Q2.

Transistor Array

You will need some level of voltage division as shown in the figure. In addition to using the DMM, look for excessive noise using the datashret even though you are measuring the dc voltage matching.

Also observe that because the oscilloscope does not have a floating input i. Q3 and Q4 form a simple current source. Set up your input signals, again use 1 kHz. By using a