ruwan2
Member level 5
Hi,
I read a paper about VCO design in an IC. It is 1.8 V supply. The VCO frequency gain is 270 MHz/V. When I try to simulate in Matlab, I find it has problems. The 1.8 V has maximum only frequency range of 270 * 1.8=486 MHz. How can it reach 3.128 GHz of its goal?
Is my understanding wrong? I cannot find another VCO gain definition yet?
Thanks,
- - - Updated - - -
I got it from a similar post, see below please. It is about relative range. Thanks,
https://www.edaboard.com/threads/150499/
For instance, it you have a 3 volt power supply, and you need to tune from 2 to 2.3 GHz, you need more than 100 MHz per volt for the vtune range available to cover the entire band.
I read a paper about VCO design in an IC. It is 1.8 V supply. The VCO frequency gain is 270 MHz/V. When I try to simulate in Matlab, I find it has problems. The 1.8 V has maximum only frequency range of 270 * 1.8=486 MHz. How can it reach 3.128 GHz of its goal?
Is my understanding wrong? I cannot find another VCO gain definition yet?
Thanks,
- - - Updated - - -
I got it from a similar post, see below please. It is about relative range. Thanks,
https://www.edaboard.com/threads/150499/
For instance, it you have a 3 volt power supply, and you need to tune from 2 to 2.3 GHz, you need more than 100 MHz per volt for the vtune range available to cover the entire band.