公开(公告)号：US20240354056A1

公开(公告)日：2024-10-24

申请号：US18305869

申请日：2023-04-24

Applicant: STMicroelectronics International N.V.

Inventor： Pierre Gobin ,  Jeremy Ribeiro De Freitas

IPC: G06F7/485 ,  G06F5/01 ,  G06F7/556

CPC classification number: G06F7/485 ,  G06F5/012 ,  G06F7/556

Abstract: A circuit for computing sine and cosine of an angle iteratively includes: a counter; an angle updating circuit configured to compute, for each iteration, an updated value of the angle; and a coordinate updating circuit including: a first register for storing a cosine value; a second register for storing a sine value; and a first custom floating-point adder/subtractor (CFPAS) circuit and a second CFPAS circuit having a same structure, where an output of the first register and an output of the second register are coupled to a first input terminal and a second input terminal of the first CFPAS circuit, and are coupled to a second input terminal and a first input terminal of the second CFPAS circuit, where an output of the counter is coupled to a third input terminal of the first CFPAS circuit and a third input terminal of the second CFPAS circuit.