G
garyr
- Jan 1, 1970
- 0
I needed a 24 KHz oscillator so I thought I would use the one shown in
Figure 5.30, p285 of A of E (schematic below, view with fixed font). My
first version, which used a SN74LVC2G04, would not oscillate. The second
version using 2 SN74HC1G04s did. My question is: why didn't the LVC version
oscillate? Both were made with SM parts on PC board.
+--/\/\--+-- -||--+
| 36k | 0.01 |
| \ |
| /1.88k |
| |\ \ |\ |
| | \ | | \ |
+ -| >0-+---| >0+-
| / | /
|/ |/
Figure 5.30, p285 of A of E (schematic below, view with fixed font). My
first version, which used a SN74LVC2G04, would not oscillate. The second
version using 2 SN74HC1G04s did. My question is: why didn't the LVC version
oscillate? Both were made with SM parts on PC board.
+--/\/\--+-- -||--+
| 36k | 0.01 |
| \ |
| /1.88k |
| |\ \ |\ |
| | \ | | \ |
+ -| >0-+---| >0+-
| / | /
|/ |/