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Re: how to configure an fully differential opamp as follower
If you connect + output to - input and - output to + input then you have no more inputs to your circuit and there will be stability issues both AC and DC with a non ideal amp. You can use unity gain adjusted fully differential opamps...
Impedance matching has different meanings depending on the application. In High Frequency circuits (digital or analog) and long lines ("long" always depends on the frequency) impedance matching is used to reduce reflections on the transmission line by matching the transmitter and receiver...
Output impedance should be as low as possible to make it independent from load impedance except of course if the output is a current source in which case you need a high output impedance.
If your input is voltage driven it is good to have as high input impedance as possible so that it will not...
lm741 comparator circuit
Be carefull when using opamps as comparators.
1. Most opamps inputs are not designed to include the supply rails in their nominal voltage range. Some even reverse the output when their voltage input range is exceeded.
2. Most opamps are not rail to rail output so be...
Any fixed regulator with any output voltage can also be used as an adjustable regulator with higher reference voltage. Use the ground pin as the adjust pin and the rest is the same only problem is that the shunt resistor used for current sensing will consume more power and for very low currents...
Re: help me to using TP3067
Use circuit in figure 1 of the datasheet. First of all you need to determine the levels that you need for the conversion. Depending of the gain of your analog interface (between the analog line and the codec) you must calculate the maximum expected level at the codec...
Re: Capacitor Selection
it depends on the type of capacitors that you use. Regarding size the 5uF is probably a better choice but the two 2.2uF give you more flexibility in terms of PCB design. For heat loss check the capacitors datasheet sometimes smaller caps have lower esr (if it is...
How do you bias the output transistors? Try a standard biasing circuit. You can find more information in Douglas Self's site
www.dself.dsl.pipex.com/ampins/ampins.htm
For switching supplies better use Low ESR and long life capacitors. Most manufacturers have a low ESR series. Depending on your frequency you might want to consider ESL (Equivalent series inductance) as well or use high frequency ceramics or polypropylene caps in parallel with the bulk capacitor.
Sorry but companies usually romove components from their product portfolio when they do not sell enough to maintain a production line.
About the output stage I had something like this in mind. This is only the principle not a full schematic. I believe that a gain of 8-10 for the output stage...
The reason that the IC you mention is not recommended for new design is that Ti is about to remove it from the production line and it is about to become obsolete.
How much gain do you need from your amplifier? Try building one with an opamp using a lower voltage supply and a transistor output...
Ethernet
I need articles e-books tutorials or books that I can order about metro Ethernet. Need information about the application of Metro Ethernet as well as the implementation.
Re: Two capacitor in series
Are you talking about ideal devices or real world capacitors? In the case of real world capacitors the output voltage will depend more on the leakage resistance of the two capacitors more than their values. For ideal devices the charge will devide the voltage if the...
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