Questions tagged [sampling]
Periodical measurement of an electronical property of a system, most often voltage.
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PCM3168A + STM32 SAI TDM: Periodic Noise at Low Sample Rates (16 kHz / 8 kHz)
I’m using TI’s PCM3168A audio codec on a DSP development board together with an STM32H725IGT, connected via the SAI peripheral in TDM mode. At sample rates of 48 kHz and 32 kHz everything works ...
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I2S Stereo ADC Soundcard Hacking
My idea is to exchange two input signals (CH_L1_IN and CH_L2_IN) at each 192kHz clock to produce one signal (CH_L_OUT), sampled at the very same 192kHz. In this way, in the digital domain I will ...
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For what reasons could my embedded controller's sample time have been too long?
Sorry if this isn't quite the place to ask such a specific control-engineering-oriented question. I'm trying to speed-control a brushed DC motor after doing some manual identification from a time-...
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What is the sampling rate? [duplicate]
I have been trying to learn more about SDR with GNURadio. I am wanting to work with WiFi signals using the SDR. After researching this topic, I have found that the sampling rate for many devices are ...
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Why couldn't instant sampling exist?
Sorry if this is a silly question, but why do sampling period exist in the first place? What limits how fast a sampler samples and why couldn't "instant sampling" exist?
Consider some kind ...
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On the input stage of an oscilloscope sampling circuit
Grosso modo, the standard input stage of a sampling circuit has traditionally the following form:
simulate this circuit – Schematic created using CircuitLab
In high performance sampling ...
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Charging time of a capacitor for a differential RC configuration
The charging time constant for an RC circuit as follows is tc=R*C.
But how to calculate the charging time of capacitor in the following circuit where the capacitor is connected to a differential ...
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STM32F401RE ADC Sampling time is very low
I am trying to detect zero crossings of a 50Hz sinusodial signal, with the ADC.
My code is like this, with a small offset I am trying to detect zero crossings and than give a small pulse just to see ...
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Can we assume/deduce sensor's cut-off frequency from datasheet?
In most of the datasheet I have seen, the cut-off frequency is not explicitly given and the exact type of filter neither. However, most of the time, we have informations about the sampling rate that ...
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Random carrier PWM for the dc-dc converter
I have been implementing a control software for the buck dc-dc converter. The converter with following parameters \$R_L=19.0\cdot 10^{-3}\,\Omega\$, \$L=10^{-3}\,\mathrm{H}\$ has a battery at its ...
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Am I doing something wrong in making this gate bootstrapped switch?
I am following this Analog Mind article by Behzad Razavi (DOI : 10.1109/MSSC.2020.3036143), I am trying to design a gate bootstrapped switch which can sample 12-bits at 500MHz using the process ...
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Chopping behavior of ADC output
A group parterner of mine is calibrating a board, and the ADC output is somewhat confusing
A closer-up view at one of the 1.5v platforms looks like this
So it seems as if the output has been ...
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Sample and Hold IC specification
I am currently designing my 3rd year project in EE. I have an MCU with an ADC that samples at 15 kHz. The signal I want to sample has a 0.5 µs rise time which is equivalent to a bandwidth of 700 kHz, ...
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Oscilloscope Low Sampling at uHz Sinus Signal
I tried to measure a sinus signal at 1000 µHz with my R&S RTC1000 oscilloscope (bandwith 300 MHz). The function generator that I used was the EDU33212A. I set the T/div=100s and the oscilloscope ...
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Oscilloscope Total Record Samples Vs Signal Frequency
I have the oscilloscope R&S® RTC1000 at 300MHz / 2GS/s / 500Mpts (Mega Points) with 12 horizontal divisions on the screen.
1st Example:
If I have a signal 1Hz the total samples that the ...
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