RF Signal Integrity to Power Integrity

This series of articles talks about RF power supply topics and the challenges power rails can pose for noise-sensitive RF and signal chain applications.

ZOUT from Transient Response:

April 23, 2024

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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ZOUT to NISM: Output Impedance to Non-Invasive Stability Measurement

January 16, 2024

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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Reconstructing a Loop Transfer Function from Output Impedance Zout

January 2, 2024

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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Output Impedance Zout

October 16, 2023

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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In this part of our blog series about voltage regulator module (VRM) characteristics, we continue to consider output impedance, Z_OUT.

Load Regulation ΔVout/ΔIout and Output Impedance Zout

October 6, 2023

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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In this installment of our blog series about Power Supply Ripple Rejection, we’ll take a break and shift our focus from PSRR to output impedance Z_OUT.

PSRR in the Real World

August 3, 2023

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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In this blog post, we continue our investigation into a VRM’s Power Supply Ripple Rejection (PSRR) performance. In earlier posts, we reviewed PSRR concepts by running a couple of simulations and now we power up a real VRM in the lab.

PSRR, A Measure of the Effectiveness of Filtering an Upstream Supply

July 25, 2023

Masashi Nogawa,, Sr. Member of Technical Staff, Qorvo

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In a previous part of this series on power integrity, we reviewed the meaning of Power Supply Ripple Rejection (PSRR) and in this and the following blogs, we continue to explore the subject.