Name: Anonymous 2017-08-31 12:29
I->---+---------->-O
|
(cap)
|
(resistor)
|
I<----+----------<-O
I->---+---------->-O
|
(cap)
|
(resistor)
|
I<----+----------<-O
## ## ### ######## ########
## ## ## ## ## ##
## # ## ## ## ## ##
## ### ## ####### ## ##
### ### ## ## ## ##
I->---+-(resistor)-+->-O
| |
+---(cap)----+
I<------------------<-O
Similarly, in an RC circuit composed of a single resistor and capacitor, the time constant τ (in seconds) is: [ τ = R * C ] where R is the resistance (in ohms) and C is the capacitance (in farads).
; it is inversely proportional to the cutoff frequency f, that is, [ f = 1 / 2 *π *τ = 1 / 2 *π *R *C ], where f is in hertz, τ is in seconds, R is in ohms, and C is in farads.
In digital electronic circuits another measure, the FO4 is often used. This can be converted to time constant units via the equation 5 τ = FO4