Popular must-read! Can't these 20 amplifier Q&A selections help you solve your problems?

EEWORLD社区

Popular must-read! Can't these 20 amplifier Q&A selections help you solve your problems? [Copy link]

If you want to learn analog circuit technology, you can't get around the amplifier.

In the Amplifier section of our ADI Chinese Technical Forum, thousands of technical questions and expert answers from engineers in actual design have been accumulated over the years. These technical questions and answers from design practice are valuable reference materials for engineers in design. In order to prevent these rich materials from sleeping in the forum, the moderator has compiled 20 recent popular Q&A posts in the Amplifier section for your reference and learning~

Click >> [Learn more about the answer]

Question List

Question 1: I want an ultra-low power current amplifier with a power supply current of uA level
Question 2: 5V VCC generates 2.5V voltage after resistor voltage division. This voltage provides virtual ground for the remaining op amps through the voltage follower. The voltage signal output by AD8615 generates a spike. What is the reason?
Question 3: The strain bridge type small signal amplifier circuit built with AD620 and OP284. The data collected after the output of OP284 is connected to a cable of about 30 meters has a self-excited noise. What is the reason?
Question 4: Why does LTspice transient simulation calculate the static operating point of the circuit first?
Question 5: How to build a high-voltage AC amplifier with a requirement of 1-10MHz 10Vpp input, 100Vpp output, and 300mA current
? Question 6: How to achieve 2G rate and simulate the addition of AC signals with a peak-to-peak value of 2V?
Question 7: A sixth-order low-pass filter was designed using ADI's Filter Wizard, but the simulation results do not match the results
Question 8: I need a current amplifier with a few milliamperes input, a hundred milliamperes output, 100 to 150 times, and a power supply of about 3.6V
Question 9: AD8422 amplifies multi-channel micro DC voltages (0 to 30mV), and the output is offset
Question 10: Does AD8138 need a higher power supply at low temperatures than at room temperature?
Question 11: ADL5605 output port short to grond
Question 12: AD8009 self-oscillates when used as an inverting operational amplifier
Question 13: When using ADA4930 to design a circuit, a tail-lift phenomenon occurs. What is the cause
? Question 14: Is the output of a transconductance amplifier high impedance?
Question 15, how to use AD5522 to design a PPMU with a positive and negative voltage of 30V?
Question 16, the op amp is used to build a constant current source with a load of 0~1K resistance. The voltage decreases as the resistance increases.
Question 17, the voltage difference between pins 5 and 6 of AD620 is inconsistent with the input during application.
Question 18, the bandwidth of AD8132 is tested according to the circuit design recommended in the manual, but the actual test bandwidth is inconsistent with the recommended value in the data sheet.
Question 19, when LT1395 is used as a voltage follower, is the choice of feedback resistor related to the power supply voltage?
Question 20, can the VREF pin of AD6645 be directly connected to the VCM pin of AD8331?