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Photodiode amplifier Design Idea prompts discussion
A recent Design Idea, "Photodiode amplifier exhibits one-third the output noise of conventional transimpedance amp" has prompted an interesting back-and-forth between some inquisitive readers and the author, Glen Brisebois of Linear Technology. See the comments in the "Feedback Loop" section on the right-hand side of the article page, or here's a Details... more...
Design Ideas cruise the analog domain
This issue's clutch of Design Ideas emanates from the analog electronics domain. Frequent contributor Marián Štofka scores a double with, first, "Paralleling decreases autozeroamplifier noise by a factor of two." Štofka parallels all four auto-zero amplifiers in an Analog Devices AD8628 and proves that t... (more) Details... more...
Design Ideas spark a variety of functional control circuits
If you need only a few nonvolatile gates, consider using a component common in analog- and mixed-signal systems, the digital potentiometer, instead of a PAL, GAL, or CPLD, as described in "Nonvolatile digital potentiometer gates logic signal."The circuit of "Soft-limiter circuit... (more) Details... more...