Timeline for How to increase frequency modulation index?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 11, 2014 at 22:47 | vote | accept | ivan | ||
| Jan 11, 2014 at 22:45 | comment | added | ivan | Ya, the last one looks quite efficient. Will play with it. Still need two 3v batteries to make single 2.7v supply. Guess not much of a problem. Thanks, @Andyaka. | |
| Jan 11, 2014 at 22:08 | comment | added | Andy aka | @ivan I think the LTC6905 will be up for it and costs about £3 in Farnell - I bet you could get it for $3 elsewhere | |
| Jan 11, 2014 at 22:05 | history | edited | Andy aka | CC BY-SA 3.0 |
added 538 characters in body
|
| Jan 11, 2014 at 22:01 | comment | added | ivan | I'm looking for 110 MHz centre frequency. Yes, 100ppm means 100ppm/degC (it is cheap). | |
| Jan 11, 2014 at 21:47 | comment | added | Andy aka | @ivan what centre frequency are you looking for? If less than 160MHz then I might have something that'll be of interest. I assume 100ppm means 100ppm/degC. | |
| Jan 11, 2014 at 21:31 | comment | added | ivan | VCXO - 10mA; RF amp - 40mA; 3V 90mAh battery. 100ppm stability; 20kHz max modulating signal with up to 1.5V rms. Thanks for your response. | |
| Jan 11, 2014 at 21:11 | comment | added | Andy aka | What current does the VXCO use and more importantly who much current does the RF power amp use? What centre-frequency stability are you after and what are your modulation data or signal rates. There are always other ways and quite possibly simpler!!! | |
| Jan 11, 2014 at 20:29 | comment | added | ivan | The thing is I want to power this transmitter from a 3V battery or so and PLLs consume too much power and voltage. | |
| Jan 11, 2014 at 20:00 | history | answered | Andy aka | CC BY-SA 3.0 |