Describe an application in which an amplifier with very high input impedance is needed.
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
Describe an application in which an amplifier with very high input impedance is needed.
- A ECG amplifier should be high input impedance.
- It is a amplifier that amplifies and record the small voltages which is generated by a person’s heart.
- So whenever placed the electrodes on the person’s skin then voltage is detected. And impedance is vary man to man.
- So, when input impedance of ECG is low then a variable voltage occurs because of loading.
- The signal can be affected by contact resistance of the electrodes with the skin.
- That’s why it does not surely represent the electrical activity of the heart.
- And when input impedance is high than the source impudence, the actual voltage produced by heart and appears at input terminals.
- That why input impedance of an ECG should be high.
Step by step
Solved in 2 steps with 1 images
