Dual mode high speed loopback with voltage level shifting and multiplexing
AssigneesAdvanced Micro Devices, Inc., Xilinx, Inc.
InventorsDinesh CHERUKUMUDI, Dinakar Venkata SARRAJU, Chuen-Huei CHOU, Morampudi MOUNIKA
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Abstract
A loopback testing circuitry comprises a pre-driver circuitry. The pre-driver circuitry comprises a first source follower (SF) circuitry, and a loopback circuitry electronically connected to the pre-driver circuitry. The loopback circuitry comprises a second SF circuitry and a current mode logic (CML) amplifier circuitry, wherein outputs of the first SF circuitry and outputs of the second SF circuitry are each electrically connected to the CML amplifier circuitry.
Claims20
A loopback testing circuitry comprising:
- a pre-driver circuitry comprising a first source follower (SF) circuitry;
- and
- a loopback circuitry electronically connected to the pre-driver circuitry, the loopback circuitry comprising a second SF circuitry and a current mode logic (CML) amplifier circuitry, wherein outputs of the first SF circuitry and outputs of the second SF circuitry are each electrically connected to the CML amplifier circuitry.
A loopback circuitry comprising:
- a first source follower (SF) circuitry;
- and
- a current mode logic (CML) amplifier circuitry, wherein one or more inputs of the CML amplifier circuitry are electrically connected to outputs of the first SF circuitry and outputs of a second SF circuitry included in a pre-driver circuitry.
A loopback testing circuitry comprising:
- a mission path;
- a PAD mode path;
- and
- a pre-driver loopback path comprising:
- a pre-driver circuitry comprising a first source follower (SF) circuitry;
- a loopback circuitry electrically connected to the pre-driver circuitry, the loopback circuitry comprising:
- a second SF circuitry;
- and
- a current mode logic (CML) amplifier circuitry, wherein outputs of the first SF circuitry and outputs of the second SF circuitry are each electrically connected to the CML amplifier circuitry.
Dependencies are inferred from the claim text.