Table of Contents
What is the major difference between a BJT and a MOSFET?
Differences between BJT and MOSFET
| BJT | MOSFET |
|---|---|
| The input impedance is low | The input impedance is high |
| The switching frequency of BJT is low | The switching frequency of MOSFET is high |
| It is used for the low current application | It is used for the high current application |
What is difference between CMOS and BJT?
BJT is a bipolar device i.e. current produced in it is a result of two carries whereas CMOS is unipolar device, due to the presence of two type of current carries in BJT it produces more noise and makes it less stable.
What are the main constructional differences between a MOSFET and a BJT what effect do they have on the current conduction mechanism of a MOSFET?
A BJT has an emitter, collector and base, while a MOSFET has a gate, source and drain. 3. BJTs are preferred for low current applications, while MOSFETs are for high power functions.
Why FET Opamps are better than BJT Opamps?
The input impedance at the gate of an FET is very high, unlike the BJT, which comparatively has much lower impedance. Additionally, the conductivity of the channel depends on the voltage applied to the Gate, essentially making it a voltage-controlled device, unlike the BJT, which is current-controlled.
What is the main difference between MOSFETs and BJTs in terms of their IV characteristics?
While both have three terminals, these differ. The MOSFET has a source, drain, and gate whereas the BJT has a base, emitter, and collector.
What is the difference between FET and MOSFET?
A FET works on the principle of a gate terminal changing the resistance between two other terminals (the source and drain) of the device based on a change in the field under the gate. A MOSFET is a metal oxide field effect transistor. The MOS describes the gate configuration.
What are the advantages of MOSFET over JFET?
Benefits or advantages of MOSFET ➨They have much higher input impedance compare to JFET. ➨They have high drain resistance due to lower resistance of channel. ➨They are easy to manufacture. ➨They support high speed of operation compare to JFETs.
What is the difference between D MOSFET and e MOSFET in terms of operating modes?
Depletion mode MOSFET is normally turned on at zero gate voltage. Such devices are used as load resistors. MOSFETs with enhancement modes are the common switching elements in most MOSs. These devices are deactivated at zero gate voltage and can be switched on by powering the gate.
What is the difference between BJT and CMOS op amps?
CMOS op amps have a much higher input impedance than their BJT counterparts, due to the capacitance of MOSFET gates. This leads to almost zero input bias current. CMOS op amps also generally draw less power, but we have reached the bottom of the list.
Why do op amps have JFETs and BJTs in them?
Some op amps (for example, the TL074 or the LF357) use a mixture of JFETs and BJTs to achieve better characteristics in some respects than a bipolar-only design. (JFETs are preferred over MOSFETs due to their greater resilience when it comes to brief overloads and static discharges.)
What is the difference between a BJT and a MOSFET?
Vive la différence! It is worth pointing out that fundamentally the transconductance of a BJT is much higher than for a MOSFET. i.e. the current varies with the exponential of the applied voltage in the case of a BJT, whereas it only varies with the square of the voltage for a MOSFET.
What is the difference between CMOS op amps and femto amps?
CMOS – CMOS op amps are slow, but have excellent non-ideal characteristics (bias currents in the FEMTOamps), extremely high input impedance (TERAohms), drift about as much as general purpose op amps, and may cost a few dollars. This is the type of op amp that can get its output within millivolts of the rails, but rail voltage is limited.