# 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-

864 questions
Filter by
Sorted by
Tagged with
4k views

### RS422 charachteristic impedance and its variants

This is regarding the RS422 bus hardware. I have a receiver that has Vih of 1.8V and a max of Vcc(3.3V). Supposing I link a driver and receiver up. The driver,as per the EIA RS422 standards state ...
1 vote
330 views

### Interfacing an RS422 driver and receiver

I am trying to interface an RS422 driver and a receiver. What are the important voltage parameters I need to understand when selecting the relevant chips. From what I understand the most important is ...
1 vote
1k views

### RS422 basics understanding

I am understanding the basics of RS422. Now, consider a driver (RS422) connected to a reciever. Now, we have a termination resistor of about 100Ohms or 120Ohms. Now, imagine the driver sends out Voc ...
1 vote
1k views

### Designing a Multistage Amplifier

I have to design a BJT multistage amplifier to meet a specification provided by my professor. The first stage is to be a differential amplifier, and the second stage is to be a common collector ...
173 views

### Differential pair circuit

I have the following differential pair circuit that is designed to have a diff gain of 4 V/V and a power consumption of 1mW. The transistor should be biased to have a Veff=0.3V and should have a ...
145 views

### Testing Triple Differential Driver AD 8147

I'm working on project that requires me to convert my single ended RGB signal(VGA from PC) to differential ended RGB. I made this circuit given below the only change that I made was using a 4.7K ...
1k views

### How to compensate for op-amp offset voltage for AC current?

For simulation purposes, I know that one can setup a difference amplifier configuration and compensate for offsets for DC current by adding a voltage source on the inverting input, and adjusting it's ...
35k views

### Difference between differential op amp and comparator

What is the difference between a differential op amp and a comparator? I know a comparator can only give me two values (the supply values). The differential op amp amplifies the difference between ...
681 views

### Definition of differential input resistance

What is a differential input resistance ($R_{\text{id}}$) in a differential amplifier? Could you show me the expression for this quantity? I think it is: R_{id}=\frac{v_{id}}{i_{id}}=\frac{v_{i2}...
1k views

729 views

### Can you explain this differential amplifier exercise to me?

So we have the exercise in the figure The figure is The solution according to the book is VE=-0.7 Volt thus I=(-0.7+5)/4.3=1 mA so re= 50 ohm.Why is re=50 Ohm here? a) Ad=V0/Vd=α*2/2re .Why is ...
11k views

### Impedance matching components with Ethernet

I’m designing a small switching circuit for 1000Base-T Ethernet and have a concern regarding impedance. The board design consists of 3 shielded Ethernet jacks and 4 DPDT relays (here) made for high ...
970 views

### Why does Ethernet on UTP have much greater range than other modern protocols?

OCuLink, SATA, USB 3, and Displayport all provide on the order of a few Gbps per signaling pair, and are limited to a cable length of just a couple meters. Ethernet via comparable cabling provides ...
4k views

### What does pseudo-differential mean?

I often read the term pseudo-differential when looking for ADCs. I know common differential means that the ADC measures a difference between two of its pins (AN+, AN-). But what is the difference to ...
1k views

I am trying to feed a 5V signal to AD7705 which is a 16 bit ADC and expects differential inputs. Do I need to divide my 5V signal using bridge and then feed it to the ADC or can I use it as a single ...
530 views

### Single-Ended Input operation of Differential ADC

I am looking at purchasing a 14-bit ADC chip (http://www.farnell.com/datasheets/1882573.pdf) for a battery monitoring project that I am working on, and am using a differential amplifier measuring ...
2k views

### Current mirrors as active loads in BJT differential amplifier, what does that mean?

I have seen current mirrors being used as current source in differential stage of an amplifier design. The reason given is that the current mirror has a very high output impedance and behaves like an ...
1k views

### Differential Amplifier doesn't output the expected voltage?

I have the following differential amplifier in simulation. According to the theory I know, the output should be 0.2V - the difference between the two inputs at 2V and 1.8V. What am I misunderstanding ...
198 views

### CML signal to ground terminated line or peak sensing ADC for short pulse

I'm currently designing the prototype of a timing instrument. One sensor gives an analog CML (current-mode logic) signal, from an amplifier (ADN2880). One end of the pair is routed to a comparator (...
2k views

### BJT differential amplifier output saturation

I'm making a long-tailed pair amplifier using a current mirror, the circuit has the following layout: I simulated it on PSpice and it worked, you can see the bias here: I tested it in the real ...
2k views

### Create a differential output signal

I need to supply the galvo driver with a signal "Voltage Range ±3.0V p-p or ±10.0V p-p (Differential Input)" - that's what it says in the datasheet. I have a 0-5V single ended DAC and differential ...