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Active Coil Decoupling by Impedance Synthesis using ...
https://cds.ismrm.org/protected/11MProceedings/PDFfiles/332.pdf
passive decoupling (Fig 2). Coil 1 is driven directly, while Coil 2 is operated through a FOCF controller, to identical 300W RF amplifiers with output circulators. A vector coupler in the path of power amp #2 provides feedback to the FOCF system. To demonstrate active coil decoupling, we set the ratio and
MT-101: Decoupling Techniques - Analog Devices
https://www.analog.com/media/en/training-seminars/tutorials/MT-101.pdf
power supply rejection ratio (PSRR). For an amplifier, PSRR is the ratio of the change in output voltage to the change in power supply voltage, expressed as a ratio (PSRR) or in dB (PSR). PSRR can be referred to the output (RTO) or referred to the input (RTI). The RTI value is equal to the RTO value divided by the gain of the amplifier.
Amplifier Stability
https://www.ozvalveamps.org/stability.html
Keep in mind that these may be high enough in frequency to be outside the passband of many cheaper “audio” CRO's. The workshop AM radio tuned off a station can sometimes give an indication of RF-oscillation in an amp. Most valve guitar amp output stages are fitted with small RF-stopper resistors right on the grid pin, VHF-style, typically 1k5. The …
Chapter 8 Amplifiers: Stability, Noise and Gain IF amplifiers
http://mwl.diet.uniroma1.it/people/pisa/SISTEMI_RF/MATERIALE%20INTEGRATIVO/Kikkert_RF_Electronics_Course/11-RF_Electronics_Kikkert_Ch8_AmplifierStabilityNoise.pdf
RF Electronics Chapter 8: Amplifiers: Stability, Noise and Gain Page 6 2004-2009, C. J. Kikkert, through AWR Corp. This is a circle on the Smith Chart called Output Stability Circle. The amplifier is stable for output conditions if Out < 1. Microwave Office allows Stability Circles to be plotted at different operating conditions.
Stable, Closed-Loop, Automatic Power Control for RF ...
https://www.analog.com/media/en/technical-documentation/application-notes/AN-1507.pdf
LOG AMP DAC* RF INPUT SIGNAL RF OUTPUT SIGNAL 412Ω 1kΩ SETPOINT VOLTAGE 220pF 1nF 1nF 120nH 120nH 100pF 100pF 100pF *SEE COMMONVARIATIONS SECTION 08515-001. Figure 1. ADL5330. Operating in an Automatic Gain Control Loop in Combination with the AD8318 (Simplified Schematic: Decoupling and All Connections Not Shown)
Proper Design Techniques Solve High-Speed Op-Amp …
https://www.electronicdesign.com/technologies/analog/article/21771753/proper-design-techniques-solve-highspeed-opamp-stability-problems
Finally, power-supply decoupling, normally an RC low-pass filter in the power-supply line, is even more effective in preventing RF energy from flowing between amplifier stages that share a common ...
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