Sách điện/Mạch điện/Mạch điện 2 cổng/Mạch điện điện trở

Mạch Chia Điện

i = \frac{V}{R_{2} + R_{1}}

V_{o} = i R_{2} = R_{i} \frac{v_{i}}{R_{2} + R_{1}}

\frac{V_{o}}{V_{i}} = \frac{R_{2}}{R_{2} + R_{1}}

\frac{V_{o}}{V_{i}} = \frac{R_{2}}{R_{2} + R_{1}}

V = V_{2} \frac{R_{1}}{R_{1} + R_{3}} = V_{1} \frac{R_{1}}{R_{2} + R_{1}}

\frac{V_{2}}{V_{1}} = \frac{R_{1} + R_{3}}{R_{1}} \frac{R_{1}}{R_{2} + R_{3}}

\frac{V_{2}}{V_{1}} = \frac{R_{1} + R_{3}}{R_{2} + R_{3}}

i_{1} = i_{2} + i_{3}

\frac{v_{i}}{R_{1}} = \frac{v_{i} - v_{o}}{R_{2}} + \frac{v_{o}}{R_{3}}

\frac{v_{i}}{v_{o}} = (\frac{R_{3}}{R_{1}}) (\frac{R_{2} - R_{1}}{R_{2} - R_{3}})

\frac{v_{o}}{v_{i}} = (\frac{R_{3}}{R_{1}}) (\frac{R_{2} - R_{1}}{R_{2} - R_{3}})

R_{E Q} = (R_{1} ‖ R_{2}) + R_{3}

R_{E Q} = \frac{R_{1} R_{2}}{R_{1} + R_{2}} + R_{3}

R_{1} = \frac{R_{a} R_{b}}{R_{a} + R_{b} + R_{c}}

R_{2} = \frac{R_{b} R_{c}}{R_{a} + R_{b} + R_{c}}

R_{3} = \frac{R_{c} R_{a}}{R_{a} + R_{b} + R_{c}}

R_{a} = \frac{R_{1} R_{2} + R_{2} R_{3} + R_{3} R_{1}}{R_{2}}

R_{b} = \frac{R_{1} R_{2} + R_{2} R_{3} + R_{3} R_{1}}{R_{3}}

R_{c} = \frac{R_{1} R_{2} + R_{2} R_{3} + R_{3} R_{1}}{R_{1}}