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    An interesting experimental phenomenon related to electric field

    Hi, I find an interesting related to electric field when doing experiment. I put a chip which has the following simplified circuit inside Scanning Electron Microscopy(SEM), an electron beam is irradiating on R1. The AC source is isolated from earth by using a capacitor C1 and resistor R3 in...
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    problem encountered when using function generator and oscilloscope

    Hi, I observed the following phenomenon when using Oscilloscope(Tekronix TDS 2024B) to measure the output voltage of function generator(Agilent 33250A). 1. connect both leads of function generator to the oscilloscope probe and ground clip, ideal sine wave 10 Hz is observed. 2. Only connect...
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    how to remove PGA socket from the PCB

    Hi all, I have a PGA socket soldered on the PCB, like below, I wonder will an ordinary solder sucker (or de-soldering pump) be able to remove the socket from the PCB since the solder points are small?If not, is there any other way I could do it? Thanks.
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    Need help on a socket's PCB footprint

    Hi, I want to put a OTS-16-1.27-04(SOP16) on my pcb, I use eagle cad to design the PCB. I first search the internet and couldn't found any library which contains this component. Then I try to build the component's schematic and footprint by myself. I met a problem when trying to draw the...
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    Need help on design PCB.

    Hi, I have a board in my hand like shown below. First, I want to know is this board a pcb? Because this board has some different feature comparing with common pcb like shown below. I want to make a board which has the same function as the one shown above.The board need to have an array of...
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    Chassis ground

    Hi all, I saw many equipments have the grounding symbol on their chassis,like shown below I was wondering why we need to ground these chassis? I think the ground line coming out of the outlet has already grounded the equipment chassis, why we need to do that again?
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    Ground loop of Agilent 33250A

    Hi all, I have some questions about the manual of Agilent 33250A, " Ground Loops Except for its remote interface connectors and trigger connector, the 33250A is isolated from chassis (earth) ground. This isolation helps to eliminate ground loops in your system and also allows you to reference...
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    Question about grounding

    Hi, I have a question about some materials I've read in terms of grounding. Below is the material. " III An Illustration of a Typical Power Supply Grounding Error As previously pointed out, the ground symbol, in many cases, has been taken as a generic symbol in electronic circuit diagrams to...
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    Stable floating power supply

    Hi, I have a MEMS device which is simply a actuator connected to a displacement sensor. I apply a voltage to the actuator to make it move forward, the load sensor is connected to a conditioning circuit, from the output voltage of the conditioning circuit, I could tell the displacement. Now I...
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    What kind of lead should I use?

    Hi, I have a PGA chip(attachements). I wonder what kind of leads can I used to connect the pins in the PGA chip, just like shown in attachments?
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    What does the symbol imply?

    Could anyone tell me what does the symbol below and the term represent for?
  12. C

    Theory of operation of MS3110 high resolution capacitive sensor

    I am going to use the MS3110 to measure capacitance in a MEMS device, below is the function block diagram of this chip. and the transfer function of this circuit is I tried to derive the transfer function, but I met a problem which is that I think amplifier here is used as an integrator, the...
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