Separating high pass and low pass TIA output bands.

Started by Artist in sci.electronics.design5 days ago 45 replies

I have an assignment to design a transimpedance amplifier for a photodiode. The bandwidth is to be 40MHz, and there are to be two outputs, a...

I have an assignment to design a transimpedance amplifier for a photodiode. The bandwidth is to be 40MHz, and there are to be two outputs, a high pass output above 20kHz and a low pass output below 20kHz all the way to DC. It is permissible that the two bands overlap a little bit. The noise performance of an amplifier is primarily determined by the noise in the first stage where it is...


Solar chargers, wondering about the output connector

Started by Sonnich Jensen in sci.electronics.design6 days ago 4 replies

Hi I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I...

Hi I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I wonder: It has a connector for the solar panel, and for the battery. Here I'd just consume from the battery? They have an output for consumption - have anybody taken them apart and can tell me why? I could see the use of a LC filter, as the charger wit...


OT: London Tube Bomber was Syrian Refugee - Official

Started by Cursitor Doom in sci.electronics.design6 days ago 38 replies

Perhaps it's not such a great idea to take in refugees after all? http://tinyurl.com/y8s8h783 -- This message may be freely reproduced...

Perhaps it's not such a great idea to take in refugees after all? http://tinyurl.com/y8s8h783 -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocol...


USPS Informed Delivery

Started by Anonymous in sci.electronics.design6 days ago 23 replies

You can preview mail yet to be delivered. Informed Delivery provides eligible residential consumers with a digital preview of their household's...

You can preview mail yet to be delivered. Informed Delivery provides eligible residential consumers with a digital preview of their household's incoming mail scheduled to arrive soon. Users can view greyscale images of the exterior, address side of incoming letter-sized mailpieces (not the inside contents) via email or an online dashboard. Check out our FAQs for more details. htt


OT: Neoliberalism now seen as 'uncool' among the young

Started by Cursitor Doom in sci.electronics.design6 days ago 38 replies

Thank God for youthful rebellion! http://tinyurl.com/yd7246sj -- This message may be freely reproduced without limit or charge only via...

Thank God for youthful rebellion! http://tinyurl.com/yd7246sj -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this c...


OT: A commendable Rape in Sweden

Started by Cursitor Doom in sci.electronics.design6 days ago 16 replies

Rape is, of course, normally no laughing matter. But here's one exceptional example that gladdened my heart today....

Rape is, of course, normally no laughing matter. But here's one exceptional example that gladdened my heart today. Enjoy... http://tinyurl.com/yao5l5rj -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per re...


AI Regulation of Message Content Coming to a Newsgroup Near You

Started by Anonymous in sci.electronics.design6 days ago 6 replies

http://www.pewinternet.org/2017/03/29/the-future-of-free-speech-trolls-anonymity-and-fake-news-o nline/ And none too soon! Eliminate...

http://www.pewinternet.org/2017/03/29/the-future-of-free-speech-trolls-anonymity-and-fake-news-o nline/ And none too soon! Eliminate parasitism, stupidism, ignorantism, redneckism, irrationalism, narcissism, and many many other isms.


Help Please -- very strange oscillator problem

Started by Anonymous in sci.electronics.design6 days ago 34 replies

Could some electronics guru please help ? I have two identical(same resistor, capacitor values) implementations of an astable multivibrator. I...

Could some electronics guru please help ? I have two identical(same resistor, capacitor values) implementations of an astable multivibrator. I am using the 2N3055 and each transistor drives a coil each of a bifilar coil, whose common terminal is connected to a 12 Volt 2A(max) DC power supply. The coils is air core. The problem is that one implementation works as designed, the other does ...


AD620 (instrument amp.) input current

Started by George Herold in sci.electronics.design1 week ago 10 replies

An AD620, I've got 1 k ohm in the input lead (v-). When the output voltage rails, I find that the input is drawing 'significant' current (a...

An AD620, I've got 1 k ohm in the input lead (v-). When the output voltage rails, I find that the input is drawing 'significant' current (a few mA.) I can change the amount of current by changing the 'gain' resistor. And also the voltage difference on the input... the larger the difference the larger the current. At highest gains (1k) (lowest R_g = 50 ohm)) the current is the highest. ...


OT: Conservative commentators chose media over Trump

Started by Anonymous in sci.electronics.design1 week ago 10 replies

"Given a choice of whom to believe, reliably pro-Trump commentators, such as Tucker Carlson, Ann Coulter and Mike Cernovich chose the media,...

"Given a choice of whom to believe, reliably pro-Trump commentators, such as Tucker Carlson, Ann Coulter and Mike Cernovich chose the media, Charles E. Schumer and Nancy Pelosi over the president." LOL. Talk about being inconsistent and hypocritical. https://www.washingtonpost.com/news/the-fix/wp/2017/09/16/trumps-fake-news-attack-lost-its-power -this-week/?utm_term=.6bcdb35d3522


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