# Questions tagged [scaling]

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### Can this analog voltage be scaled and shifted to the new range using op amps with only ±12V power supplies?

I have an analog voltage signal which is in the range [+2.1875 V ... +2.8125 V], centered around 2.5 V. I would like to scale and shift this signal so that it is mapped to the range [-3V ... +3V], and ...
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### 16 Hall-Effect Linear Sensors to Analog Muxer to an Op amp scaler to ADC

I am planning out a midi controller because not enough of those exist. Down to my inexperience please point out some gotcha I may be missing. The short version of what I am doing. Basically 16 hall ...
123 views

### Why are printed circuit boards so low-scale compared to integrated circuits?

Firstly, by low-scale I mean the sense of very-large-scale-integration, so the question is: Why are there so few and such thick wires on a typical PC printed circuit board, compared to the (orders of ...
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### Scaling battery voltage to 3.3V ADC input

I came across a circuit similar to that depicted below which scales a battery voltage which can range from 11-22Vdc to 0-3.3Vdc for a MCU ADC input. In the circuit I came across, the diode used is a ...
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### How can I do two points scaling in electronics? 0.6 V - 3.2 V to 0.0 V - 3.3 V

I'm seeking a solution how to do a two point scaling in electronics. I have tried an Op-amp, but it did not work very well. So I wonder if you have some ideas how to do two point scaling from e.g 0.6 ...
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### Correcting non-linear response of 5050 RGBW LED strips

I'm a non-engineer asking this question. I'm using a so-called 5050 RGBW LED stips for a project. The level of each colour is controlled by a mosfet transistor (IRLZ34N) which is in turn modulated by ...
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### How to change get positive value on my weighting Scale?

My weighting Scale is working fine when I keep weight after the start. But I am getting stuck when I keep weight before starting my weighing device. When I do this auto-calibrate with available weight....
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### How to scale my hal ratiometric sensor output?

I have a UGN3505 sensor that converts magnetic flux to voltage. The output at zero magnetic flux is 2.5V and the difference in the flux depending on the polarity varies the voltage from 2.5V. I want a ...
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### What is the shortest possible *channel length* in a currently available commercial CMOS process?

I'm aware that terms like "5 nm", "7 nm" for the latest technology nodes no longer refer to any linear dimension of the transistors, although I have seen some interpretations in ...
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### Increasing supply rails for low size MOSFETs

With decreasing sizes of MOSFETs, the supply voltage has also scaled down so as that the electric fields in the device are not large enough for them to breakdown. However if this depends only on ...
1 vote
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### Fourier Transform Time Scaling Property using f (frequency) or w (omega - angular frequency)

The time scaling property for a fourier transform is as follows: My book shows this property in terms of $f$; however, my instructor likes to use $\omega$. I have also seen this property written ...
66 views

### Scaling a 0-90 ohm range to 10-520

The fuel sending unit in my car operates within a range of 10-520 ohms. I want to replace this unit for one that runs in a range of 0-90 ohms. I'm assuming I will need something to compute the change, ...
1 vote
2k views

### dB scale in LTspice

I have a question about the dB scale in Ltspice. As far as I know it uses 1 of the unit (so 1V in case of Voltage) as a reference and then plots the dB value, which is defined by 20*log(V/Vref). (So ...
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### Design of programmable scaling amplifier as a project for undergrad

I am building a custom microscope, PhD in biomedical engineering. I would like to have a scaling amplifier, with programmable offset and gain, that takes 0..10V signal X (from piezo element) and turns ...
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### Signal voltage scaling

I have a linear range control signal from 1.75 V (0%) to 3.22 V (100%) . How can I convert this to a 0-5V signal (0-100%)? I have a single +5V supply with same 0V as control signal.
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### Resistance Conversion/Scaling Circuit

I'm looking into building a custom gauge cluster for a project truck. The fuel level sending unit that I have will read 40 ohms when the fuel tank is empty, and 250 ohms when the fuel tank is full (it'...
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352 views

### Auto Scaling in a Multimeter

I’m trying to create a multimeter, I’ll be mainly using a 16 bit ADC (ADS1115), an ESP8266 on Node MCU, I’ll use the MCU to communicate with a phone app to switch between different multimeter modes, i....
1 vote
92 views

### MOSFET as a Capacitor in IC

I was reading in a book that it is often possible to realize a certain capacitance in Integrated Circuits by exploiting the Gate Capacitance of a MOSFET. I read that the main disadvantage of this ...
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### Scaling level of PWM signals

I am going to scale PWM 24V generated by PLC to PWM +5V by means of optocoupler TLP521 and MOSFET BSP295 in order to control a micro servo motor (MG90S). What I have tried till now is the below ...
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### feeding scaled down voltage to XADC (Xilinx)

simulate this circuit – Schematic created using CircuitLab I have XADC (Xilinx) with single ended voltage range of 0-1V. To regulate the output of a DC/DC converter let's say 15V i feed the ...
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### Can I change op-amp supply voltage without affecting circuit behaviour

I am working on an audio project which is based upon various sections of several different schematics from various old musical instruments. I want to make a test board that has multiple different ...
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### Acceleration of sequential computation over time

I am looking for a model (or "law", as in Moore's law) to describe the acceleration of sequential computation over time. By sequential computation I mean, for example, repeated applications of a hash ...
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### Scaling of magnetic field strength and flux density measurements and shape of hysteresis loop

Note: this is part of a larger question which I was asked to separate into subquestions. Other subquestions: 1 and 2 I'm using the method outlined here to measure the induced magnetic flux density in ...
1 vote
4k views

### Negative power supply for an op-amp

I have a 12V (single ended) power supply available for an op amp circuit I am designing. I want it to be very precise around zero volts for an output. I already thought of using a virtual ground, but ...
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### Scaling DC voltage 0v-3.3v to 0v-5v

Can someone help me with voltage scaling? I've seen some Logic Level Converters from SparkFun but time is matter so I cant wait to get those shipped. I found a topic here: Scaling DC Voltage [0V-6.5V] ...
182 views

### Video scaling vs Display scaling

I am going to start a project in FPGA and "graphical screen" scaling. I am still in the "reading-the-material-phase". Are there any differences between video-scaling and display(e.g. Windows Desktop)-...
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### What is a ‘dense integrated circuit’ or ‘integrated function’ and how does it relates to Area in Moore’s law?

I am very comfortable with the usage of the Moore's law and its impact on microelectronics. However I had always associated Moore's law to the gate length scaling as a factor of square root of 2 every ...
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### How to scale and shift voltage signal?

I want to scale and shift my voltage signal by below relation: $$V_{out} = \frac {10} {12} \cdot V_{in} - 10$$ Indeed my primary voltage is from 0v to 24v and I want to put it from -10v to +10v. ...
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### What MCU-type hardware is needed to read 12-110MHz pixel data from a video decoder? [duplicate]

The goal is to display PAL/NTSC (576i/480i) video on 32x16 RGB LED matrix. Scaling down the video is thus needed. From that point it is fairly easy – 32x16 image used to drive the matrix. I have ...
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### is there a way to relate a frequency to other frequency by some circuit or mcrocontroller

A circuit that outputs a fraction of the input frequency controlled by some micro-controller or electronic circuit or component. Say I am feeding the said circuit ...
1 vote
228 views

### Scaling amplifier, analog switch, fast response

simulate this circuit – Schematic created using CircuitLab Hello everybody, I just try to design a scaling amplifier with different slopes and offsets. The problem is that the transient ...
1 vote
205 views

### Scaling a car's injector pulses to count and time them?

What would be an efficient way to reshape a car's injector pulses to digital 0-3.3V pulses, so a microcontroller can count and time them? The waveform can be seen on this page under "Example waveform"....
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### Whole board design scaling in EAGLE 7.5.0 (free version)?

I have designed a very simple PCB in EAGLE that should be approximately W: 10mm, L: 30mm in size. This design is repeated 18 times (I need many of them). However, for some reason, the whole PCB is ...
2k views

### LTSPICE - Scale dimensions

I want to specify the scaling factors for my mosfet dimensions. How do I do it ? I am following some beginner tutorials but they have done everything in HSPICE. I use LTSPICE. And LTSPICE doesnt seem ...
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### Relation between Voltage & frequency in DVS

As per Wiki - "In DVS, Overvolting is done in order to increase computer performance" How Overvolting will increase performance?? Also, it says " By applying a higher voltage to the devices in a ...
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### scaling a voltage down using op amp

I have already looked and found similar things but still couldn't solve my own problem. I have an input voltage of 9V to 11V and I want to scale it to 0V to 5V. It's better if it is linear but it's ...
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### Eagle printed PCB scale problem

I have made a layout using eagle then save it as PDF to print a test paper before routing. I didn't design any package its all eagle's packages. I exported PDF as shown on the image but the problem ...
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### IF signal amplify without delay

I have a RF Frontend that has an 4 IF signal output (2 I channel and 2 Q channel from 2 receiving anettans). Each channel of the IF has a signal rangining from 1.5V to 3.5V with a DC offset of 2.5V. ...
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### Multiplex based autoscale, question on simple circuit

I was looking for a clever way to automatically scale voltages from, say, 0-50V with a mux to an ADC (0-5V) without worry of damaging my inputs. My thought a simple amplifier with selectable gains ...
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### Why is BJT scaling not as significant as MOSFET scaling?

When reading about integrated circuits, MOSFET scaling comes up very often, however BJT scaling is never discusses. What's the reason for this?
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### How to scale output of FIR filter implemented in VHDL

For a DSP school project we need to implement sound effects in a SPARTAN 6 FPGA using VHDL. We tried to keep it simple and start off with a simple (100Tab) FIR filter. As coefficients we used those ...
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### When does Direct Source-Drain tunneling become a problem?

Because of the probabilistic nature of quantum mechanics, direct source-drain tunneling is bound to happen as a result of CMOS scaling. The smaller the transistors become, the more tunneling occurs. ...
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### Combined ADC level shift/offset and scaling

I'm trying to sense the voltage from a 2 cell Li-ion battery that has a usable range from 2.5 to 4.4 Volts per cell (nominal 3.0 - 4.2 V). The ADC I have has a range from 0 - 1.8 V and is 12 bits. I ...
3k views

### Simple DC voltage scaling with two ranges, lower range voltage limited

I am attempting to monitor DC voltages that can range from 0 to 250V with a micro controller. A simple voltage divider should be suitable for the broad range up to 250V, with somewhat coarse ...