Отправлено: 13.11.09 15:19. Заголовок: Operazionnie ysiliteli ,ZAP/AZP & (продолжение)

1941: First (vacuum tube) op-amp

An op-amp, defined as a general-purpose, DC-coupled, high gain, inverting feedback amplifier, is first found in US Patent 2,401,779 "Summing Amplifier" filed by Karl D. Swartzel Jr. of Bell labs in 1941. This design used three vacuum tubes to achieve a gain of 90dB and operated on voltage rails of ±350V.
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It had a single inverting input rather than differential inverting and non-inverting inputs, as are common in today's op-amps. Throughout World War II, Swartzel's design proved its value by being liberally used in the M9 artillery director designed at Bell Labs.
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This artillery director worked with the SCR584 radar system to achieve extraordinary hit rates (near 90%) that
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would not have been possible otherwise.[3]
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http://en.wikipedia.org/wiki/Operational_amplifier

 Отправлено: 27.04.24 03:35. Заголовок: https://www.analog.c..

https://www.analog.com/en/resources/technical-articles/considering-gsps-adcs-in-rf-systems.html

SNR is a more linear improvement, as the decimation filters reduce the amount of integrated noise for the receiver chain. With no decimation, the SNR is 56.4 dBFS; at 8× decimation, the SNR is 63.5 dBFS; and at 96× decimation, the SNR is 72.8 dBFS. As a point of comparison, best-in-class data converter performance for ~100 MSPS devices like the AD9467 and LTC2208 is an SNR of 75 dB and an SFDR of 100 dBc. This class of performance has long been required by the heterodyne signal chains in which ADCs like the AD9467 were commonly used. The AD9082 can achieve the same noise and dynamic range, while eliminating the heterodyne signal chain size, weight, power, and cost—and it is also able to scale to much higher instantaneous bandwidths as required!