The operation amplifier configuration of a few ideal assumes block has feedback report to match character faultlessly normally, and be like,the blame ideal element that actual condition is resistor can affect all sorts of circuit parameter in all the model is restrained than, harmonic is lack fidelity with stability.

 

An operation amplifier is equipment of enlarge of voltage of electron of dc coupling tall gain, have the input that need branch and Chan Duan to output normally. In this configuration, operation amplifier produced an output potential (opposite at circuit ground connection) , ambitious at inputting the voltage between terminal.

 

The actual performance of accurate amplifier and modulus converter can not reach the level of good value, because of the electron yuan what parts of an apparatus is not the place on its norms book to describe is so perfect. The accuracy that passes the network resistor that match far the schism resistor that excel did not match, if the description on norms book applies to accurate integrated circuit adequately in that way,assure resistor function.

 

In sheet of power source plan piece in the design of integrated circuit, we normally the practice is as far as possible accurate match interior yuan parts of an apparatus. For example, the input transistor need of operation amplifier matchs accurately will offer low compensation voltage. If we must use schism transistor in operation amplifier, we need to will compensate voltage control to be in 30mV or above. This still needs accurate match an internal resistance.

 

Graph one

 

 

 

 

 

The compositive amplifier that need branch made full use of accurate of an internal resistance match to move block technology with laser. Of these compositive parts of an apparatus admirable in all the model restrains expression to depend on of the integrated circuit of elaborate design accurate match to dog with temperature.

 

Dog finally gain is passed use sealed enclosed conjugate (1:1Scale) resistance will come true. The Wen Piao of block of these cipher telegram exceeding essence of life is carried in heat or Leng Duan only 0.05ppm/ ℃ , of two-phase adjacent resistor dog Wen Piao under 0.1ppm/ ℃ . Dog to realize first-rate parameter, must make appliance has extremely low absolutely Wen Piao (the one big character that exceeds accurate resistor) resistor, the block that can avoid temperature difference to cause is worth drift.

 

The function of a variety of circuit that need branch depends on the performance that matchs resistor. Any do not match to be able to be caused in all modular error. In all the model is being restrained is more important than a be this kind of circuit measure a level, how many to because of its representing is,have redundant in all modular signal will be carried in output appear. In circuit in all the model restrains get than can adopting the following formula:

 

 

CMRR=1/2(G+1)/ΔR/R (among them G = gain [enlarge coefficient] , r = block is worth [ohmic] )

 

 

The accurate resistor that in the amplifier that need branch use Gao Pi matchs to spend is crucial, it is especially in the medical treatment equipment of a few nicety, be like electronic scanning microscope, hematic cell diagnoses bougie inside computation appearance and body.

Graph 2

 

 

 

 

Huisi connects bridge (or thin arm bridge) circuit application is very wide, it is nowadays in contemporary operation amplifier, we can connect Huisi bridge circuit joins with all sorts of sensor. Unlike compare value of a sealed block and foregone block cost, huisi connects bridge to there are a lot of uses in circuit. Circuit of Hui Sitong bridge is namely between power source end and ground connection two simple resistor series-parallel connection, should arise between two shunt-wound shunt when bridge achieves a balance 0 press difference.

 

Hui Sitong bridge has two inputs end and two output end, in including to be like a graph 4 arrange the resistor that is like diamond appearance. This is the brushwork of typical Hui Sitong bridge. When be used together with operation amplifier, huisi connects the bridge to be able to be used at measuring the slight change that is worth with enlarge block. The filmy resistor that uses block of cipher telegram exceeding essence of life to make bridge balance groovier than using wants many accurate. Because 4 resistor are active, their match to having crucial effect evenly to bridge with stability.

Graph 3

 

 

The Huisi after the balance connects bridge to differ minute of amplifier to be able to be used at electrified wire netting of power plant intelligence measure. Also can use at solar energy converter, its work efficiency depends on directly the bridge that uses tall stability resistor balances a gender.

The operation amplifier of nicety low a confusion of voices is used at a signal normally from sensor (like temperature, pressure, light) give out, and before entering modulus converter. Below this circumstance, two parameter of amplifier are having conclusive effect to good systematic resolution: The input compensates voltage and input voltage noise. Block of cipher telegram exceeding essence of life has the character of low compensation and low noise, make the sensor interface that equipment becomes ideal and summon for trial implement.

Graph 4

 

 

 

 

Operation amplifier sue for peace is formulary:

 

 

Operation amplifier sue for peace
 

Graph 5

 

 

Block of cipher telegram exceeding essence of life special also the input end that applies to digital-to-analogue converter. Digital signal makes lower noise through the block of cipher telegram exceeding essence of life that match, those who reduce output imitate signal is lack fidelity. The noise level of tinsel technology is – 40dB, make foil technology resistor makes the good choice that high-end frequency modulus is changed and resistor and gain resistor consult in digital-to-analogue change-over circuit. The radio frequency interference of amplifier of operation of low a confusion of voices in domain of aviation electron, war industry, space navigation is having conclusive effect in equipment, include chip of gyroscope, GPS to control amplifier and antenna directional control is unit.