US 11,863,225 B2
Electronic devices having quadratic phase generation circuitry
Andreas Menkhoff, Oberhaching (DE); Andreas Boehme, Munich (DE); Bernhard Sogl, Unterhaching (DE); Jochen Schrattenecker, Alberndorf in der Riedmark (AT); and Joonhoi Hur, Sunnyvale, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 7, 2021, as Appl. No. 17/468,482.
Prior Publication US 2023/0075465 A1, Mar. 9, 2023
Int. Cl. H04B 1/40 (2015.01); H03K 5/01 (2006.01); H03K 5/00 (2006.01)
CPC H04B 1/40 (2013.01) [H03K 5/01 (2013.01); H03K 2005/00013 (2013.01)] 19 Claims
OG exemplary drawing
 
1. Wireless circuitry comprising:
at least one digital-to-analog converter having an input and an output that is coupled to an antenna; and
a quadratic phase generator having
an output port coupled to the input of the at least one digital-to-analog converter,
a first integrator stage having an input and an output,
a second integrator stage having an input coupled to the output of the first integrator stage and having an output connected to the output port, and
a switch having a first input configured to receive a first value that is a function of a chirp count q that defines a number of chirps at the output port, a second input configured to receive a second value different than the first value, and an output that is coupled to the input of the first integrator stage.