swanann2000
Member level 1
Hi everybody!
I want to switch between two DC sources (24V & 36V). These sources may supply a quite high current (0.5 A):
+------+
+24 Vdc o-|-o\ |
| \ |
| o-|-o Output (max. 0.5A)
| |
+36 Vdc o-|-o |
+------+
|
|
+------+
| |
| uC |
| |
+------+
The purpose of this cirucit is to transmit a low baud rate serial communication
signal (~10 KBaud) over a supply line:
V(t) |
| (Serial data)
36V -| +-+ +---+ +---+
| | | | | | |
24V -|----+ +-+ +---+ +----------- (DC)
|
|
|
|
+-------------------------------------> time
I've tried a very simple switch with a NPN & a PNP plus some resistors and a
diode, but the result hasn't been as expected, and the efficiency is quite low.
Besides, a 1 KOhm load resistor is needed in order to increase the switching ti-
me (from 36V to 24).
I would prefer to limitate the emission of the circuit, that is, the switching
shouldn't radiate too much.
Any one can help me? Any proposal is welcome
Thanx in advance!
I want to switch between two DC sources (24V & 36V). These sources may supply a quite high current (0.5 A):
+------+
+24 Vdc o-|-o\ |
| \ |
| o-|-o Output (max. 0.5A)
| |
+36 Vdc o-|-o |
+------+
|
|
+------+
| |
| uC |
| |
+------+
The purpose of this cirucit is to transmit a low baud rate serial communication
signal (~10 KBaud) over a supply line:
V(t) |
| (Serial data)
36V -| +-+ +---+ +---+
| | | | | | |
24V -|----+ +-+ +---+ +----------- (DC)
|
|
|
|
+-------------------------------------> time
I've tried a very simple switch with a NPN & a PNP plus some resistors and a
diode, but the result hasn't been as expected, and the efficiency is quite low.
Besides, a 1 KOhm load resistor is needed in order to increase the switching ti-
me (from 36V to 24).
I would prefer to limitate the emission of the circuit, that is, the switching
shouldn't radiate too much.
Any one can help me? Any proposal is welcome
Thanx in advance!