I have a question about PLL.Currently I am performing differential interference analysis using signal generators from other companies, but there is a problem.The sign of the phase is changed by turning on / off the power supply.My question is· Is it possible to control the initial phase and phase sign (positive Θ or negative Θ) when TI PLL locks the phase?· If possible, is it possible by register manipulation of the IC or is it necessary for external circuit?Waiting for your answer.
Can you tell me what the TI part no. is for the device in question?
Online Systems Support - Analog
In reply to Jeffery Pfarr:
In reply to user4905227:
In reply to Noel Fung:
Thank you for your reply.
PFD_DLY register adjusts the timing of lock by adjusting pulse width of Charge pump.What I want to control is the direction of phase advance.(I drew a figure in the attached file)
The phase at the start of Charp can be arbitrary, but I want to fix the direction in which the phase advances.
Is it possible to fix the direction in which the phase advances with the LMX 2492?
Also, if it is not possible with an IC, is it possible to control the phase with an external circuit?
phase timing chart.pdfWe will be wqqqaiting for your reply
is this something you are looking for? I don't think we have control on the phase.
Hello, Mr Jeffery Pfarr.
Thank you for your replay.
I am terribly sorry for the delay in contacting you.
It will be the last question.
Is it possible to adjust the phase at the beginning of Charp?
Looking at the Phase graph, the Phase at the beginning of Charp is irregular.
Is there a way to make Phase constant?
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