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Archive for June, 2021

Bode Plot Analysis of switching Power Supplies

Bode Plot Analysis of switching Power Supplies

Overview A Bode plot is a graph that maps the frequency response of the system. It was first introduced by Hendrik Wade Bode in 1940. The Bode plot consists of the Bode magnitude plot and the Bode phase plot. Both the amplitude and phase graphs are plotted against the frequency. The horizontal axis is lgω (logarithmic scale to the base of 10), and the logarithmic scale is used. The vertical a...
Bode Plot Analysis of switching Power Supplies

Debug & Analysis of IoT Power Requirements

Battery life is an operating-profile problem, not a single current reading. A connected device can spend most of its time in microamp sleep, wake for milliseconds, draw a large radio burst and return to sleep. A useful measurement therefore has to capture peak current, charge per event, time in each state and the frequency of those states. Turn the user requirement into a power budget Oper...
Bode Plot Analysis of switching Power Supplies

Utilising Deep Memory with Rigol DS1000 Oscilloscope

Oscilloscope memory determines how long an acquisition can remain while retaining useful time resolution. The original DS1000D/E instructions described a one-million-point record as deep memory. Current instruments may provide tens or hundreds of millions of points, but the underlying trade-off is unchanged: time span, sample rate, active channels and record length must be considered together. ...
Bode Plot Analysis of switching Power Supplies

Debug and Analysis Considerations for Optimising Signal Integrity in Your Internet of Things Design

An embedded bus can decode correctly on the bench and still fail after the enclosure, flex cable, sensor stack or production wiring is introduced. Signal-integrity testing should therefore establish a repeatable analogue baseline, reproduce what the digital receiver sees and track margin as the mechanical and firmware design changes. Measure the physical signal before trusting the decode Ex...
Bode Plot Analysis of switching Power Supplies

Meeting Embedded Design Challenges with Mixed Signal Oscilloscopes

Embedded systems combine analogue behaviour, digital state and serial communications. A mixed-signal oscilloscope brings those views onto one timebase so an engineer can connect a corrupted transaction to its electrical cause, firmware state or analogue response. Four error classes to separate TimingCheck setup, hold, clock-to-data relationships, interrupt latency and the delay from a comm...

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