Questions tagged [differential]

Differential refers to any kind of signaling where the signal information is carried by two or more paths and both are required to properly reconstruct the signal. For example, USB D+ and D-

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782 views

Are common and differential mode chokes interchangeable?

Is it possible to use a common mode choke as a differential mode by switching around one pair of wires and v.v. as shown on the drawing? Intuitively it seems that this should work. I need a power ...
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3answers
2k views

Can you sum and difference in a single op-amp?

I want to take two independent differential signals (audio line inputs with unknown properties which may be present or not), remove any common-mode noise from each of them (they could each have ...
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267 views

How is the differential mode noise suppressed by adding a capacitor across the Lines

I was reading about the common mode noise and differential mode noise. I don't understand how a differential mode noise gets coupled and how adding a capacitor across the line will help. I ...
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1answer
662 views

BJT Differential amplifier. Tail Resistance. Input Resistance

Here is the schematic of the BJT diff amplifier, I wanted to solve (design). The task is from the book "Art of Electronics". Exercise 2.18. Verify that these expressions are correct. Then ...
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4answers
148 views

Frequency response of difference amplifier

I'm studying the difference amplifier circuit configuration of op amps, reading from this datasheet. I know that unlike the instrumentation amplifiers, the difference amplifier differential gain can ...
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1answer
34 views

Referencing multiple differential pairs to ground before analog multiplexer

Yesterday I asked how to properly reference a differential signal (in my case from a current transformer) to ground, and got told that the impedance to ground should be matched at the location where ...
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104 views

Measuring voltage without a common ground

When measuring a power source voltage using a differential amplifier, without a common ground with amplifier supply, to which ground should we connect the differential amplifier resistor ground? V1 ...
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1answer
64 views

Long tailed pair

How do I adapt the long tailed pair to fit my requirements? I've seen circuits where they use 9V Vcc with 10k resistors. From my understanding the resistors are there to prevent floating base from ...
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2answers
957 views

Differential Driver Maximum Output Voltage Swing

I'm trying to understand how BTL driver on TI's DRV8662 Piezo Haptic Driver (datasheet) works. What I am confused about is how a 200Vpp output signal can be generated from a driver that only has rails ...
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2answers
1k views

RS485 communication problem

I've designed a board with microcontroller (NXP, K64) to control i/o's. The uart port of the uC is connected to Maxim 3362 which converts the signal to RS485 half duplex communication. Using modbus ...
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1answer
603 views

Differential Amplifier with Global Negative Feedback

This question refers to audio amplifier design, using BJTs only. I am wondering how differential stage amplifier plays an important role in hi-fi audio amplifiers. According to this book (where ...
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2answers
233 views

Finding Vout and Gain of a differential amplifier

I am given this figure below: And I am trying to find Vout and the gain. From looking at this source: https://www.electronics-tutorials.ws/opamp/opamp_5.html I have determined the gain to be 10k/1k ...
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1answer
205 views

Effect of bias resistor value on common-mode rejection in a differential or instrumentation amplifier

In the below schematics a source is coupled to a differential amplifier. Rb is a bias resistor for bias currents to flow: Since in instrumentation amplifiers it is a remedy to add resistors for bias ...
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107 views

Which load resistance is connected to generator U2?

I have this op amp and one of the questions says Which load resistance is connected to generator U2? This is my attempt but I can not confirm if it right. No it's not homework, it examples I'm ...

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