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AR# 62330

XAPP589 v2.2 - VCXO G1 / G2 Range is incorrect

Description

In version v2.2 and previous of the VCXO XAPP589, it states the following in table 5:

G1[4:0] Input Filter linear path gain: range 0 to F.
G2[4:0] Input Filter integrator path gain: range 0 to C.

Solution

The ranges listed are incorrect and should be:

G1[4:0] Input Filter linear path gain: range 0 to 12 h.
G2[4:0] Input Filter integrator path gain: range 0 to 14 h.

The condition G2>G1+2 should always be respected for stability.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
56136 XAPP589 - XAPP1241 - All Digital VCXO Replacement (PICXO) - Design Assistant / Master Answer Record N/A N/A
AR# 62330
Date Created 10/02/2014
Last Updated 04/16/2015
Status Active
Type General Article
Devices
  • Kintex-7
  • Artix-7Q
  • Artix-7
  • More
  • Virtex-7
  • Virtex-7Q
  • Zynq-7000
  • Zynq-7000Q
  • XA Zynq-7000
  • Less