公开(公告)号：US10256723B1

公开(公告)日：2019-04-09

申请号：US16044772

申请日：2018-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Marcello Vaccalluzzo ,  Michael Ryan Hanschke ,  Salvatore Giombanco

IPC: G05F1/10 ,  H02M3/156 ,  H02M1/00

Abstract: A power factor correction (PFC) integrated circuit having a feed forward circuit. The feed forward circuit comprises a first current source, a second current source, and a third current source, a first bi-polar junction transistor (BJT), a second BJT, a third BJT, and a fourth BJT coupled together in a translinear cell, where the first current source is coupled to the first BJT, the second current source is coupled to the second BJT, and the third current source is coupled to the third BJT, a biasing network coupled to the first BJT and to the second BJT and configured to maintain equal collector-to-emitter voltage across the first BJT and the second BJT, where the feed forward circuit is configured to output a current based on a current of the first current source, a current of the third current source, and a current of the second current source.

公开(公告)号：US10228713B1

公开(公告)日：2019-03-12

申请号：US15850072

申请日：2017-12-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Michael Ryan Hanschke ,  Salvatore Giombanco ,  Timothy Bryan Merkin

IPC: G05F3/26

Abstract: A current mirror includes a first pair of transistors, wherein gates of the first pair of transistors are connected together, and a second pair of transistors coupled to the first pair of transistors. Gates of the second pair of transistors are connected together. A first resistive device is coupled across a drain and a source of one of the transistors of the second pair of transistors. A second resistive device is coupled across a drain and a source of the other transistor of the second pair of transistors. The first pair of transistors are configured to operate in weak inversion at an input current to the current mirror within a first current range and the second pair of transistors are configured to operate in strong inversion at an input current within a second current range.