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Type: Posts; User: jimmykk

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  1. Closed: Rigid flex Cross section OrCAD PCB Designer

    Hi

    I am looking into designing a 2 layer rigid and 1 layer flex PCB on PCB designer 17.2. The rigid area is decided but the flex area is not completely decided yet. Here is the cross section:...
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    241

    Closed: Re: OrCAD Capture rigid flex

    Thanks for reply, but could not find any connector with that name.
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    241

    Closed: OrCAD Capture rigid flex

    Hi
    I have a silly question regarding Capture. I am making a rigid flex board where i have only a 20pin connector on rigid PCB and
    the flex PCB will be having only these conductors coming from this...
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    Closed: Ultrasound Transmitter

    Hi
    I have a Evaluation Board TX7316 for Ultrasound signals. I am running it in 3 level mode. It can be run in on chip or off chip mode.
    When i run it on chip it has limitations in terms of number...
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    Closed: OrCAD CIP CIS problem

    Hi

    I have added a couple of connectors using CIP feature in OrCAD. And i can place them on Schematics but the problem is when i
    open part manager the part number of these connectors is shown as...
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    Closed: Transmitter circuit output

    Hi

    I am observing a Tx output where sometimes the output is pulled directly down to 0V while in other cases, it goes slowly to ground making a trajectory.
    What causes this behaviour.
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    Closed: Re: Master slave connection

    Hi
    Thanks for reply.
    I just wanted to know what is the best possible way to connect these D+, D- and GND together.
    Soldering all the wires together won't be a good solution. Are there any...
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    Closed: Master slave connection

    Hi
    I have 2-wire RS485 serial communication with one Master and Max. 5 slaves. All these serial cables from Master and slaves have to be connected inside a junction box. I am looking for a connector...
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    Closed: TX7316EVM Troubleshooting

    Hi
    I have a TX7316EVM development board:
    http://www.ti.com/lit/ug/sbou224a/sbou224a.pdf
    It needs 3 bench power supplies to operate which can deliever +-5VDC(.2A) on J3 connector, +-50VDC(.03A) on...
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    Closed: Test a TVS diode in a circuit

    Hi
    I have a TVS Diode(LCDA24) in circuit which can't be taken out. I want to test whether it's OK or not.
    In diode test mode:
    On the first diode, i am getting OL reading when forward and reverse...
  11. Closed: Re: RC Filter components selection after rectifier circuit

    The input is 1 MHz Sine pulse (with let's say 100 cycles) coming from transformer with around 1A Current.
    50 ohm resistors are for flow of the majority current as the goal is to just detect that...
  12. Closed: RC Filter components selection after rectifier circuit

    Hi

    I have a Sine pulse input with 40V Amplitude and is connected as shown:
    152798

    I was wondering about the selction of these 2.2uF and 1K resistor . I have used electrolytic capacitor and...
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    Closed: Re: Current sink circuit

    I get that Rs determines the Io. But one thing that is unclear to me is the collector of that transistor.
    Should it be connected to a load ....
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    398

    Closed: Re: Current sink circuit

    You mean if i connect resistor between pin: Vi(batt) and Io as per circuit above?
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    398

    Closed: Current sink circuit

    Hi

    I was looking into this circuit for constant current sink and was wondering about the working
    and output voltage of this circuit.
    151496
    I am trying to implement this circuit and in my...
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    Closed: Re: Distorted Sine output from Transformer

    Thanks for suggestion..... but i am not sure how adding a capacitor in series between amp and transformer would have an influence on the
    interested frequencies from 40khz to 400/500khz. won't it...
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    Closed: Re: Distorted Sine output from Transformer

    The values are 40khz to 400khz and 20ohm to 2500ohms.
    I am using pure sine wave as input.
    I ran a test with a transducer with frequency range 100khz to 400khz and its impedance changes from 20 ohms...
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    Closed: Re: Distorted Sine output from Transformer

    <<My first idea: did you check the output current of the amplifier?>>

    I didn't measured it but it is supposed to deliver between 1-2A

    ***

    What exactly does this mean?
    40 kHz ... 300 kHz?...
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    Closed: Distorted Sine output from Transformer

    Hi

    I am using an amplifier(LT1210) with +-15V Supply and its output is connected to a transformer RM10 core N97 with 9:150 step up ratio and its output has to be connected to various ...
  20. Closed: Swapping Tx+ Tx- wires in Ethernet communication

    Hi

    A simple question regarding if i change Tx+ wire with Tx- and vice versa in Ehternet communication. Will the communication still be possible ?
    If yes, Eventually, does it also apply to RS-422...
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    Closed: Re: BNC Cable resistance measured

    Not sure, the only thing written is Hitachi Denshi AT-10AF.
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    Closed: Re: BNC Cable resistance measured

    I tried connecting a 110ohm resistance on the loose end on one of the cables and the value comes out to be 230 ohm on the cable which earlier measured 120 ohm when measured without that 110R. ...
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    Closed: BNC Cable resistance measured

    Hi

    I cut two BNC cables with lengths around 15cm with one end having BNC connector and the other end loose stripped with tool. Why are these cables showing 120 and 260 ohm resistance respectively...
  24. Closed: Re: Op amp circuit with different cut off frequencies

    So if i set C2=1uF with same resistor values i.e. 12k for Ra, Rb and Rin. Would it help to pass the frequencies from 50khz to 1.2Mhz.

    As i see BW1 as a low pass corner which has cut off freq less...
  25. Closed: Re: Op amp circuit with different cut off frequencies

    Hi
    I forgot to mention that Op amp i used is LT1210.
    LT1010 is used to provide the 12V Bias voltage of 12V into the + input terminal as Vs+ is 24V.
    "Yes, BW2 and BW2 are high-pass corners and...
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