App note from Murata about matching the measured voltage to the input of a digital meter. Link here (PDF) It is oftentimes necessary to attenuate “large” input signals down to a level that more closely matches the input range of a selected meter. For example, suppose the signal to be measured is 19 Volts, and […]
Tag Archives: Murata
App note: 4-20mA current loop primer
Basics of current loop App note from Murata, discussing the basic theory of the 4-20mA current loop operation. Link here (PDF) The 4-20mA current loop is a common method of transmitting sensor information in many industrial process-monitoring applications. A sensor is a device used to measure physical parameters such as temperature, pressure, speed, liquid flow […]
App note: Direct current ammeters
App note from Murata about digital ammeter and things to consider implementing them. Link here (PDF) There is a trend to replace older, analog-style readouts with modern digital displays. As one might expect, the conversion is not always a trivial task. This is especially true when the conversion involves older, moving-vane (“pointer” style) analog ammeters. […]
App note: Signals with zero offsets
Dealing with zero offsets signals tackled in this app note from Murata. Link here (PDF) Many transducer outputs exhibit a dc offset voltage when the output level would normally be expected to be zero Volts (corresponding to a display reading of “000”). As an example, consider a pressure transducer whose output levels of 1.0Vdc to […]
App note: Analog common and Reference IN-OUT
App note on Murata’s Digital panel volt meters analog common and reference pins. Link here (PDF) Perhaps the least understood I/O pin on all DMS Series DPM’s is ANALOG COMMON. The confusion surrounding this pin is not unjustified since it should be left open, i.e., have no external connections, in the vast majority of normal […]
App note: Noise suppression for wireless headphones
Wireless headphone interference investigation from muRata. Link here Recently, the popularity of wireless headsets has been growing as the number of situations where people “play sports while listening to music” increases. Bluetooth is frequently used for communication between smartphones and headsets. However, audio can skip due to communication errors, so countermeasures are required. This is […]
App note: High-Power backup
App note from Murata on application of Electrical double layer capacitors (EDLCs). Link here (PDF) When you consider backup function in your product, Murata’s supercapacitors (also known as EDLCs, Supercaps) are suitable for backup energy device. Murata’s supercapacitors can discharge in high power up to 10A. Therefore they can cover wide range of backup function […]
App note: Implementing a line frequency meter
Circuit from Murata about line frequency measurement utilizing Murata’s DMS series digital voltmeters, LM2917 frequency-to-voltage converter and a transformer for isolation. Link here (PDF)
App note: Engineering scaling
Scaling large values to be fed on limited input digital meters, application note from Murata. Link here (PDF) It is oftentimes necessary to attenuate “large” input signals down to a level that more closely matches the input range of a selected meter. For example, suppose the signal to be measured is 19 Volts, and the input […]
App note: Transformers
All about transformers and its different uses in this application note from Murata. Link here (PDF)
App note: Inductors
Murata’s application note about inductors and its specifications. Link here (PDF) Reading a specification for an inductor is considered a simple task, however, there is often some confusion even over the meaning of relatively straight forward parameters.
App note: The LED versus LCD decision
Choosing between two display types, LED and LCD discussed in this application note from Murata. Link here (PDF) Users of contemporary digital panel meters (DPMs) have a variety of options available to them. While options are nice, they invariably mean more choices have to be made. After determining what meter resolution one requires, the next […]
App note: Tracking/Sequence for point-of-load DC/DC converters
Another app note (PDF) for power sequencing from Murata Whereas in the old days, one master switch simultaneously turned on the power for all parts of a system, many modern systems require multiple supply voltages for different on-board sections. Typically the CPU or microcontroller needs 1.8 Volts or lower. Memory (particularly DDR) may use 1.8 […]
App note: Output capacitive load considerations
App note(PDF) from Murata on output capacitors loading when in a switch mode power supply There are numerous factors to consider when adding external capacitors to switched-mode power supplies (SMPS). This article will discuss noise, startup, ESR, stability, pre-bias applications, Sense inputs, On/Off (remote enable) controls and other topics. Many real-world DC/DC applications require external […]
App note: EMC design guidelines
A great guide (PDF) to electromagnetic compatibility from Murata International regulations regarding electromagnetic compatibility (EMC) affect many aspects of circuit and system design. However, there are many techniques that can be applied generally to reduce both the emissions from and susceptibility to, electromagnetic interference (EMI). As a manufacturer of electronic components, Murata Power Solutions is […]