StudentSA
Member
I am nearing the end of one of my electronics projects, however I have hit a problem and I really need help in designing a suitable linearity V-F.
I have requested help before while still familiarising myself with the LM331 in this post:
LM331 Post
I have now established my requirements and specifications.
I need the LM331 to be setup as a V-F with 0V = 0Hz and 10V = 30kHz
10V full scale = 30Khz
The supply will be a 12V Regulated supply.
Here is the problem ... In the datasheet
- The basic circuit given is only configured for 0 to 10kHz after which all hell breaks loose (linearity).
I do not require excellent linearity just suitable i.e 1% or so
- The precision circuit is 0-100kHz but requires + and - voltage supply. I would like to keep things simple and only use a +12 Volt supply. Also this circuit is somehow designed for -10V full scale input.
On a side note I was keen on using the AD654 ... looks amazing but I cannot source this IC at a reasonable price in SA. The Lm331 is my second best option.
Can anyone please help me design a circuit using only +12V that meets my requirements
Regards,
StudentSA
I have requested help before while still familiarising myself with the LM331 in this post:
LM331 Post
I have now established my requirements and specifications.
I need the LM331 to be setup as a V-F with 0V = 0Hz and 10V = 30kHz
10V full scale = 30Khz
The supply will be a 12V Regulated supply.
Here is the problem ... In the datasheet
- The basic circuit given is only configured for 0 to 10kHz after which all hell breaks loose (linearity).
- The precision circuit is 0-100kHz but requires + and - voltage supply. I would like to keep things simple and only use a +12 Volt supply. Also this circuit is somehow designed for -10V full scale input.
On a side note I was keen on using the AD654 ... looks amazing but I cannot source this IC at a reasonable price in SA. The Lm331 is my second best option.
Can anyone please help me design a circuit using only +12V that meets my requirements
Regards,
StudentSA