| ??? 03/03/08 04:13 Read: times |
#151776 - I think it is a kind of filter Responding to: ???'s previous message |
My estimation
the first stage is an audio pre-amp with a notch filter to cut out the 40KHz(maybe from an ultrasonic ranging transducer). Second stage is a low pass filter having poles starting at 20KHz at an interval of 15KHz. Wonder what you are trying to catch here. third stage is just an audio frequency amp configured in a BTL (bridge tied load) configuration. Suspected use: Some kind of a testing device looking for low frequencies in a ultrasonic AF. I am not familiar with avionics, so my guess may be a bummer Jerson |
| Topic | Author | Date |
| Monday Quiz - with a (sur)prize | 01/01/70 00:00 | |
| I think it is a kind of filter | 01/01/70 00:00 | |
| Alien Hamster Walkie Talkie? | 01/01/70 00:00 | |
| That's my thought! | 01/01/70 00:00 | |
| Second stage is not a filter. | 01/01/70 00:00 | |
| Maybe some sort of spy receiver | 01/01/70 00:00 | |
| Intercom | 01/01/70 00:00 | |
| Another glue | 01/01/70 00:00 | |
| Bad link? | 01/01/70 00:00 | |
| Me too! | 01/01/70 00:00 | |
| Me too | 01/01/70 00:00 | |
| Let's see ... | 01/01/70 00:00 | |
| Correct ! | 01/01/70 00:00 | |
| Yeah, I won! | 01/01/70 00:00 | |
| Why do you provide duty cycles differing from... | 01/01/70 00:00 | |
| This mixer is merely a ... | 01/01/70 00:00 | |
| Domain expired, but.... | 01/01/70 00:00 | |
| naah | 01/01/70 00:00 | |
| No, just an expired domain name | 01/01/70 00:00 | |
| I'm the pr0n King ! | 01/01/70 00:00 | |
| The URL of the schematic | 01/01/70 00:00 | |
| Starting to build this one | 01/01/70 00:00 | |
| Device ready - will upload stuff .. | 01/01/70 00:00 | |
| Old Parts | 01/01/70 00:00 | |
LOL ... NOS | 01/01/70 00:00 |