AMPLIFIER OF ELECTRIC SIGNALS OF EXTREMLY LOW AMPLITUDE AND/OR SIGNALS WHICH ARE IN THE SPACES ESPECIALLY FILLED WITH NOISES
Amplifier of electric signals of extremely low amplitudes and/or electric signals contained in environment considerably filled with noise is electronic device that in the basic performance has fixed differencial amplification, that equals Ad = 1 + R1/R2 = 1 + R4/R3 while the amplifing of a signal of...
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Zusammenfassung: | Amplifier of electric signals of extremely low amplitudes and/or electric signals contained in environment considerably filled with noise is electronic device that in the basic performance has fixed differencial amplification, that equals Ad = 1 + R1/R2 = 1 + R4/R3 while the amplifing of a signal of medium value minimizes by adjusting ballance of resistance bridge R1-R2=R3-R4 and in the most simple way, by changing one from that four resistance. The entrance resistance of amplifier is very high and restricted by entrance resistance of used operational amplifiers. New construction of amplifier enables great simplification of the very process of production of this type of amplifier, with the very fact that it is not necessary any more to take highly coupled resistances, and neither operational resistances made as dual operational resistances, as well as the number of components, in comparison to instrumental amplifier mentined in the state of art, considerably reduced.
Pojacavac elektricnih signala ekstremno niskih amplituda i/ili elektricnih signala koji se nalaze u sredinama izrazito ispunjenim sumovima je elektronski uredaj koji u osnovnoj izvedbi ima fiksno diferencijalno pojacanje, koje iznosi: Ad=1+R1/R2=1+R4/R3 dok se pojacanje signala srednje vrijednosti minimizira podesavanjem ravnoteze otpornickog mosta R1-R2-R3-R4, i to najjednostavnije, promjenom jednog od ta cetiri otpornika. Ulazni otpor pojacavaca je visok, i ogranicen ulaznim otporom upotrebljenih operacionih pojacavaca. Nova konstrukcija pojacavaca omogucuje veliko pojednostavljenje samog procesa proizvodnje ovakvog tipa pojacavaca, samim time sto vise nije potrebno raspolagati sa visoko uparenim otpornicima, kao ni operacionim pojacavacima koji se prave kao "dual" operacioni pojacavaci, isto kao sto je broj komponenti, u odnosu na instrumentacioni pojacavac naveden u stanju tehnike, znatno smanjen.
Poja ava elektri nih signala ekstremno niskih amplituda i/ili elektri nih signala koji se nalaze u sredinama izrazito ispunjenim šumovima je elektronski ure aj koji u osnovnoj izvedbi ima fiksno diferencijalno poja anje, koje iznosi: Ad=1+R1/R2=1+R4/R3 dok se poja anje signala srednje vrijednosti minimizira podešavanjem ravnote e otporni kog mosta R1-R2-R3-R4, i to najjednostavnije, promjenom jednog od ta etiri otpornika. Ulazni otpor poja ava a je visok, i ograni en ulaznim otporom upotrebljenih operacionih poja ava a. Nova konstrukcija poja ava a omogu uje veliko pojednostavljenje samog procesa |
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