Contents
What is the function of transconductance amplifier?
A transconductance turns a voltage difference somewhere into a current somewhere else. In the transconduc- tance amplificr, a voltage difference between two inputs creates a current as the output. FIGURE 5.2 Output currents of the differential pair as a function of differential input voltage.
What are the characteristics of good transconductance amplifier?
A good transconductance amplifier should have
- high input resistance and low output resistance.
- low input resistance and high output resistance.
- high input and output resistance.
- low input and output resistance.
What is the GM of a transistor?
Typical values of gm for a small-signal field effect transistor are 1 to 30 millisiemens. pinchoff voltage and IDSS is the maximum drain current. Traditionally, the transconductance for the FET and MOSFET as given in the equations above is derived from the transfer equation of each device, using calculus.
What is differential op amp?
An op-amp is a differential amplifier which has a high i/p impedance, high differential-mode gain, and low o/p impedance. When the negative feedback is applied to this circuit, expected and stable gain can be built. Usually, some types of differential amplifier comprise various simpler differential amplifiers.
What are applications of operational amplifier?
the voltage follower is a circuit in which the output voltage follows the input voltage.
What is an operational amplifier circuit?
An operational amplifier or op-amp is simply a linear Integrated Circuit (IC) having multiple-terminals. The op-amp can be considered to be a voltage amplifying device that is designed to be used with external feedback components such as resistors and capacitors between its output and input terminals.
What is audio transistor?
Typically, an audio transistor is an amplification type transistor used to boost weak audio signals, such as in radios, to levels usable by other electronic devices, such as filters, equalizers, other amplifiers, and speakers. Standard audio transistors are typically NPN-type bipolar junction transistors.