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PSoC™ 4 Forum Discussions

NXTY_Tatebayasi
Level 4
Level 4
Distributor - NEXTY (Japan)
5 solutions authored 25 replies posted 100 sign-ins

Hi, Community

I measured the margin for oscillation stop with the ECO trimmed, it was less than 1.
I would like to adjust the negative resistance because I want to ensure the margin of the phase margin is more than 5 times that of the ESR, but can I adjust it with the register setting of the PSoC4?

Or should it be adjusted only by the constant of the circuit connected to the ECO?

 

If negative resistance can be adjusted in the register settings of the PSoC4, please tell me the corresponding register.

 

Best Regards,

Chihiro Tatebayashi

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2 Replies
Rakesh_Patrudu
Moderator
Moderator
Moderator
10 likes received 100 sign-ins 25 replies posted

Hi @NXTY_Tatebayasi ,

Please specify which PSoC 4 device you are using, and make sure you followed the necessary crystal requirements when calculating the transconductance and Vpp. These values rely on a various factor, such as the crystal frequency, the load capacitance, and the system's operating conditions.

Best Regards,
Rakesh

 

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NXTY_Tatebayasi
Level 4
Level 4
Distributor - NEXTY (Japan)
5 solutions authored 25 replies posted 100 sign-ins

Hi, @Rakesh_Patrudu 

Thank you for your reply.

I am using  PSoC 4100S Max.

The frequency of the crystal oscillator I am using is 24 MHz and the load capacitance is 8 pF.
The datasheet states that the maximum ESR of the crystal oscillator is 150Ω.

Can this problem be solved by adjusting the registers in PSoC 4100S max?

 

Best Regards,

Chihiro Tatebayashi

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