Forums

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 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