Assertion: amplifier's input impedance | /r/HasProperty | high
Facets:
value: very
type: DEGREE
value: because of the small current
type: CAUSE
Source sentences:
text: Electrically, a headphone amplifier can be thought of as an amplifier that presents a very high input impedance (ideally infinite) and presents a lower output impedance (ideally zero) and larger range of output voltages (ideally infinite).
text: The input impedance is relatively high because of the small current through Q1-Q4.
text: At common mode, the two parts behave as common-collector stages with high emitter loads; so, the input impedances are extremely high.
text: The input impedance of the op-amp is very high (1 MΩ to 10 TΩ), meaning that the input of the op-amp does not load down the source and draws only minimal current from it.
text: These amplifiers have high input impedance, which means that the digital system will not need to supply a large current.
text: The input impedance is very high due to the emitter follower configurations of amplifiers 1 and 2
text: Input impedance - A Preamps input impedance should be high enough to enforce a minimum load on a device, such as a microphone.
text: The input impedance of the op-amp buffer is very high: close to infinity.
text: The input impedance of this type of global negative feedback amplifier is very high, so it won't load down the circuit driving it.
text: Often buffer amplifiers have a gain of one, i.e. they do not actually amplify, so that their output is the same amplitude as their input, but buffer amplifiers have a very high input impedance and a low output impedance and can therefore be used as an impedance matching device.
text: Differential amplifiers have high common mode rejection ratio (CMRR) and high input impedance.
text: An instrumentation amplifier is a differential amplifier optimized for high input impedance and high CMRR.
text: The transistor amplifier must have high input impedance in order to prevent it from loading the input voltage source.