# 6.002 demo#25

```6.002 demo#25
Diode Circuits and Characteristic
Prof. Lang Spring 2002
X-Y CKT HW Rect
IN4001
CH3
20
10 K
5
CH1
.1uF
10 uF
1000 uF
IN4001
CH2
7
S1
S2
FG1
S3
S4
IN914
1K
CH4
22
1K
Steps: Load set up 6.002 Demo#25A
Part 1: Show the Diode Characteristic curve and later show the Ideal diode curve by increasing the horizontal
voltage to 20 volts ( Use MATH/FFT to change the Horizontal voltage ) !
FG1 Should be set at 16 v p-p for this demo Freq = 100 HZ Sine Wave
correspond to 2 mA/Div
Later show very
steep curve
Diode Curve with
resistor in
Cite as: Anant Agarwal and Jeffrey Lang, course materials for 6.002 Circuits and Electronics,
Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of
Part 2: Load set up 6.002 Demo#25
Show the input signal, the rectifier signal and filtered signal, first show just C1 and notice the ripple and
later switch C2 in ( 10X bigger )and observe the ripple which will be almost gone but if you change the
amplitude scales you would observed some ripple. Last switch C2 in ( 1000X bigger) and observe that the
ripple will be completely gone.
FG1 should be set at 3 v p-p for this demo Freq = 100 HZ Sine Wave
3 V P-P
Show ..6 v, diode
drop
Cite as: Anant Agarwal and Jeffrey Lang, course materials for 6.002 Circuits and Electronics,
Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of
AC Line Demo Set Up
7633
7A22
+
switch box
7B53A
-
x10 probe
x10 probe
AC
We use (2) X10 probes on differential amplifier 7A22 and using caution not to ground any points and the
amplifier plug in should be set on AC not DC coupling set the voltage to 5 volts range.
Output shown with both sides clipped due
to the large numbers of computers
connected in AC power line NOT a
perfect sine wave!
Cite as: Anant Agarwal and Jeffrey Lang, course materials for 6.002 Circuits and Electronics,
Spring 2007. MIT OpenCourseWare (http://ocw.mit.edu/), Massachusetts Institute of