Hello,
I am trying to design a V to F converter for small currents. Looking into the design details and in order to prototype the circuit I wanted to get more understanding on the parameters.
I am specifically looking at Figure 5. of AN-240 and in order for this to work practically I need the following:
1. V+ value (powering LM334 and Input Zero Adjust)
2. Low value for Input Zero Adjust
3. Low value for LF351
Thanks!
Hi Yashas,
1. V+ value (powering LM334 and Input Zero Adjust)
From figure 5, it looks like the V+ is weakly connected to ground through the 1kΩ and 100Ω resistors which allows the node to sit at about -120mV for the Q2 bias.
2. Low value for Input Zero Adjust
It looks like the zero adjust is achieved by adjusting the potentiometer. Figure 3 shows the potentiometer biased between V+ and V-
3. Low value for LF351
I assume by "low value" you are referring to the negative supply voltage (V-). It appears that this design used +/-15V supply so the V- supply is -15V.
Good luck with your design.
Regards,
Zach
