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Re: Why Adding a Voltage Amplifier after a Transimpedance Amplifier reduce BW? Book Claim by 0.64

Started by Phil Hobbs May 14, 2015
On 05/14/2015 01:12 PM, Phil Hobbs wrote:
> On 05/14/2015 01:04 PM, Felipe Jimenez wrote: >> On Thursday, May 14, 2015 at 9:28:05 AM UTC-7, John Larkin wrote: >>> On Thu, 14 May 2015 09:15:53 -0700 (PDT), George Herold >>> <gherold@teachspin.com> wrote: >>> >>>> On Thursday, May 14, 2015 at 11:57:36 AM UTC-4, Phil Hobbs >>>> wrote: >>>>> On 05/14/2015 11:50 AM, John Larkin wrote: >>>>>> On Thu, 14 May 2015 04:07:59 -0700 (PDT), Phil Hobbs >>>>>> <pcdhobbs@gmail.com> wrote: >>>>>> >>>>>>>> Oh and I'm fairly certain the non-inverting amplifier is >>>>>>>> wired up correctly. Between switching back and forth from >>>>>>>> the non-inverting to the inverting configuration several >>>>>>>> times, I am fairly certain that both configurations were >>>>>>>> wired up properly. >>>>>>> >>>>>>> Hmm... "several times" does make it sound like a solderless >>>>>>> breadboard, as John suggested. Those things are slabs of >>>>>>> misery, for sure. >>>>>> >>>>>> Someone deserves an IgNobel prize for inventing them. >>>>> >>>>> They work okay for making a PIC blink a LED, as long as they're >>>>> new. >>>>> >>>>> Then of course somebody plugs in a resistor from an old reel >>>>> without removing the residual adhesive, and two of the holes >>>>> become flaky forever. Then the next resistor is maybe >>>>> oversize, and bends the crappy metal fingers apart, and the one >>>>> after that is corroded, and leaves semi-insulating dust all >>>>> over the place.... >>>>> >>>>> Not to mention a couple of pF of capacitance between adjacent >>>>> rows, and many nanohenries in series with all the (nastily >>>>> daisy chained) grounds. >>>>> >>>>> Cheers >>>>> >>>>> Phil Hobbs >>>>> >>>>> >>>>> -- Dr Philip C D Hobbs Principal Consultant ElectroOptical >>>>> Innovations LLC Optics, Electro-optics, Photonics, Analog >>>>> Electronics >>>>> >>>>> 160 North State Road #203 Briarcliff Manor NY 10510 >>>>> >>>>> hobbs at electrooptical dot net http://electrooptical.net >>>> >>>> Grin, I was laying out this little pressure circuit for testing >>>> the other day, a few flaky connections later and I grabbed my >>>> soldering iron and copper clad. >>>> >>>> I need to order more (copper clad) any decent sources? >>>> >>>> George H. >>> >>> ebay usually has tons. Or I can send you a few sheets. I might >>> even include a bit of the gold stuff. >>> >>> https://dl.dropboxusercontent.com/u/53724080/Protos/Z356_EOM_Timer/Z356_Top.JPG >>> >>> >>> >>> > https://dl.dropboxusercontent.com/u/53724080/Protos/Z338_PCB.JPG >>> >>> https://dl.dropboxusercontent.com/u/53724080/Protos/D200_BB_4.JPG >>> >>> >> >> Hey John...I'm always looking to improve my prototyping skills...What >> do you use to cut away your copper on your prototypes? I just use a >> razor and slice back and forth, but then I may create shorts when I >> fill that part with solder. I see your prototypes have a pretty good >> clearance when cutting away the copper to make isolated pads. >> > > Serrated aviation snips (Wiss M3). They last for years.
For making pads, you cut up small rectangles and glue them to the ground plane. That makes good power supply bus bars, too. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net