# Tag Info

5

IC1 has six sections (A-F) although only 4 are used the circuit. In general it is not allowed to leave inputs of CMOS devices unconnected so the two at the bottom show what to do with the inputs, connect them to ground. Section E also shows how the connections for the power supply pins of the entire device. The outputs are not used and so are shown as ...

4

The nets that are named 'CLK', 'DO', etc. are connected, just the wires aren't drawn for the sake of clarity. Now, IC1E and IC1F that are not connected to anything are unused portions of IC1, which is a hex buffer chip. One chip gives you 6 independent buffers, but in this case only 4 of them are used, so the last two have their input grounded and output ...

0

If the device has four pins, show this in the schematic symbol by putting four pins on the device. This is a good habit to get into. If you give the symbol and the part different numbers of pins, some software will get very confused. So will some people who are trying to debug or read your design :-)

2

When using Eagle's device editor, you can use 'append' to connect multiple pins to one signal. By default eagle expects all pins to be connected together, but by clicking the little icon to the left of the set of pins, you can toggle between 'all pins' and 'any pin' required for the connection.

1

There is a ULP script called renumber-sheet.ulp provided in the default Eagle installation for renaming parts; however it renames each prefix starting with 1 (e.g. R1, R2..., C1, C2...) which is not what you want. There is a script called renumber_by_page.ulp at this location (bottom of the page). It works a little differently, as it renumbers it keeps ...

2

It does not get the same signal i.e JIG_ON_N. Actually it is shutdown or reset button that requires a short push (push button) that is short this two wires. Search on Eagle Some times, schematic editor softwares using strange symbols that are not standard for industry.

3

I can give you a possible approach. For any two-port containing passive elements you can measure its admittance matrix Y, at a given frequency. simulate this circuit – Schematic created using CircuitLab This matrix Y is such that: \begin{bmatrix} i_1 \\ i_2 \end{bmatrix}= \begin{bmatrix} Y_{11} & Y_{12} \\ Y_{21} ...

2

How do you know the system is first order, was this given in the assignment? I ask because you said the box contained impedances, not any energy storage elements (capacitors or inductors). If you can confirm that it does not have any energy storage elements you can have a looked at the theory for two-port networks. The two-port theory can still apply if the ...

4

The only way this works is if the forward voltage on LED2 is higher than that of LED1. For example, LED2 might be a green or blue LED with a forward voltage of about 3.2V. LED1 could easily be a red LED with a forward voltage of about 1.7V. When Q1 turns ON, the forward voltage of LED1 pulls the collector voltage of Q1 below the turn-on voltage of LED2 ...

0

I am providing you the complete list of 49 free electronics software which are used for the schematic and more electronics purposes..... http://www.efytimes.com/e1/132694/Free-Software-On-Electronics And on 50th tool which I have used, is Logisim. This tool provides the basic digital component to make any electronics circuit even microprocessor. This is ...

0

The preamp-circuit was from here: http://www.4qdtec.com/preamp.html A few biasing resistors were all that was missing and it works after adding them in proper places.

0

You probably have a serious mistake: If GND_PHY1 is the analog ground, why the termination coupling capacitors (c9-c12) are not connected to it? (in the schematic you shown they are connected to the ground marked by a "earthing" symbol) also, tied together pins 10, SHA1 and SHA2 of U8 could be connected to the chassis ground, if any. pin VCC at u8 should ...

2

I think that you can safely assume that the inductor symbols are indeed ferrite beads. I base that on the filled rectangular block used for inductor L2. R18 is an adjustable resistor (potentiometer). The arrow indicates the clockwise direction. That is: the wiper moves Down as the shaft is turned clockwise. Note that this could be a front-panel ...

0

I have been continuing my work on the libraries and it appears that it does NOT update automatically. Perhaps there is some configuration somewhere, but it looks like the default requires you to remove the old footprint and re-add the updated one.

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