Glossary - alphabet order - "R"

RD

This is the symbol for drain resistance. See "crystal oscillation circuit".

Reference: Crystal oscillation circuit



RMS jitter

A type of jitter defined in specification. See "jitter".

Reference: jitter



RTC

Abbreviation for "Real Time Clock". See "Real time clock".

Reference: Real-time clock



Random jitter

A type of jitter defined in specification. See "jitter".

Reference: jitter



Real time clock

A real time clock is a circuit or IC that generates digital data for times and dates, etc. from a reference clock. Usually, the reference clock is a 32.768 kHz crystal unit.

Reference: Real time clock module



Real time clock module


Real time clock module (RX-8581)

A real time clock module is a crystal device incorporating into a single package a 32.768 kHz crystal unit and a real time clock IC. This module is used in computers and fax machines and other electronic equipment that requires time management functions. Not only do these modules to eliminate the need to design an oscillation circuit and the need to adjust a timepiece function, they also conserve space on the circuit board.

Reference: Real time clock



Recommended operating condition

Each recommended operating condition is a parameter with a specified range for ensuring stable product characteristics over time.



Reflection wave front aberration

Wave front aberration in a reflection path.



Reflow

Reflow soldering is one method used to solder electronic devices to circuit boards. This method exposes devices to temperatures over +200 ℃, so reflow soldering must be performed carefully, according to the reflow profile.

Reference: Reflow profile



Reflow profile

The reflow profile specifies the temperatures and time periods to be set when using the reflow soldering method to mount electronic devices on circuit boards. Failure to follow these specifications can damage the electronic devices, such as by degrading their characteristics.

Reflow profile soldered product Pb free soldered product


Refractive Index

It is the ratio of the speed of light in a vacuum to the speed of light in a medium. Snell's law is a generally known law applied to the refraction of light when light passes through one medium to the other.



Rf

This is the symbol for feedback resistance. See "crystal oscillation circuit".

Reference: Crystal oscillation circuit



Rp

Amount of P-type polarized light on the reflection path after being reflected from an optical component.



Rs

Amount of S-type polarized light on the reflection path after being reflected from an optical component.




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