IFD:Analog Circuits and Interfaces/introduction to electronics: Difference between revisions

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 [http://tinyurl.com/yxrdh8gx opamp as a comparator]
-[http://www.falstad.com/circuit/circuitjs.html?cct=%24+1+0.000005+18.278915558614752+54+5+43%0Ag+-224+16+-224+32+0%0Ag+-80+16+-80+32+0%0Ax+-336+-171+95+-168+4+18+Self-Oscillating%5CsComparator%5Cs(Square%5CsWave%5CsGenerator)%0Ax+-346+97+347+100+4+12+The%5Csopamp%5Cscompares%5Csthe%5Csvoltages%5Csat%5Csits%5Cstwo%5Csinput%5Csterminals%5Cs(%5Cp/-)%5Csand%5Cswill%5Csamplfiy%5Csthe%5Csdifference%5Cswith%5Csa%5Cshuge%5Cs(think:%5Csinfinite)%5Csgain.%5Cs%0Ax+-346+121+254+124+4+12+When%5Csone%5Csof%5Csthe%5Csinput%5Csterminals%5Cshas%5Csa%5Csslightly%5Csbigger%5Csvoltage%5Csthen%5Csthe%5Csother,%5Csthe%5Csopamp%5Cswill%5Csamplifiy%5Csthis%5Csinfinitly%0Ax+-346+146+220+149+4+12+In%5Cspractice%5Csthat%5Csmeans%5Cs--%5Csat%5Csleast%5Csup%5Csto%5Csthe%5Csvoltage%5Csthat%5Csis%5Csgiven%5Csto%5Csit%5Csby%5Csthe%5Cspower%5Cssupply.%5CsIn%5Csthis%5Cscas%5Cs%5Cp-15V.%0Ax+-346+172+450+175+4+12+This%5Csgain%5Csis%5Csillustrated%5Cswith%5Csa%5Cssinwave%5Csat%5Csthe%5Cspositive%5Csinput:%5Cswhen%5Csthe%5Cssinwave%5Csis%5Csbigger%5Csthan%5Cszero%5Cs(ground)%5Csthe%5Csoutput%5Csgoes%5Csto%5Cs15V,%5Csotherwise%5Csto%5Cs-15V.%0Aa+-224+-80+-112+-80+8+15+-15+1000000+5.7514749684324284+-7.500662599378392+100000%0Ap+-80+-80+-80+16+1+0%0Aw+-112+-80+-80+-80+0%0Ag+-288+-96+-288+-80+0%0A207+-80+-80+-32+-80+4+output%0Ac+-288+-96+-224+-96+0+1.0000000000000001e-7+-5.7514749684324284%0Ar+-224+-32+-224+16+0+10000%0Ar+-224+-32+-112+-32+0+10000%0Aw+-224+-64+-224+-32+0%0Aw+-112+-80+-112+-32+0%0Ar+-224+-144+-112+-144+0+10000%0Aw+-112+-144+-112+-80+0%0Aw+-224+-144+-224+-96+0%0Ao+8+64+0+5122+20+0.1+0+1%0A Square Wave Generator]
+[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+0.019691167520419408+54+5+43%0Ag+-240+96+-240+112+0%0Ax+-134+-188+297+-185+4+18+Self-Oscillating%5CsComparator%5Cs(Square%5CsWave%5CsGenerator)%0Aa+-240+0+-128+0+8+15+-15+1000000+-7.424733830081666+7.500746266515534+100000%0Aw+-128+0+-96+0+0%0Ag+-304+-16+-304+0+0%0A207+-96+0+-48+0+4+output%0Ac+-304+-16+-240+-16+0+1.0000000000000001e-7+7.424733830081666%0Ar+-240+48+-240+96+0+100000%0Ar+-240+48+-128+48+0+100000%0Aw+-240+16+-240+48+2%0Aw+-128+0+-128+48+0%0Ar+-240+-64+-128+-64+0+100000%0Aw+-128+-64+-128+0+0%0Aw+-240+-64+-240+-16+2%0Ao+9+64+0+4098+10+0.00009765625+0+2+9+3%0Ao+13+64+0+4098+10+0.00078125+1+2+13+3%0A Square Wave Generator]
 * the opamp's output can also directly follow one of its input voltages, but providing more current. This is the basis building block of opamp based amplifiers and is called "voltage follower" or "buffer".