公开(公告)号：US20190081605A1

公开(公告)日：2019-03-14

申请号：US16111555

申请日：2018-08-24

Applicant: JVC KENWOOD CORPORATION

Inventor： Hideaki SHIOZAWA

IPC: H03G3/34 ,  H04B1/10 ,  H03G3/30 ,  H03F3/183

CPC classification number: H03G3/344 ,  H03F3/181 ,  H03F3/183 ,  H03F2200/03 ,  H03F2200/372 ,  H03G3/3005 ,  H03G2201/103 ,  H04B1/1027

Abstract: A noise squelch processor generates a noise squelch determination signal by comparing a noise level and a threshold value with each other. A carrier detector generates a carrier determination signal indicating whether or not a reception signal is present based on a signal strength of the reception signal. An integrator controller controls an integrator to set a cutoff frequency of the integrator to a second cutoff frequency higher than a first cutoff frequency at a first timing when the carrier detector generates a carrier determination signal indicating that the reception signal is present, and to switch the cutoff frequency of the integrator from the second cutoff frequency to the first cutoff frequency at a second timing after an elapse of a predetermined period from the first timing.