The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1998
Filed:
Jan. 31, 1996
Yoichi Sakaue, Kanagawa, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A digital and analog reception apparatus includes a first mixer (MIX1) which converts up a reception signal having an input frequency fa inputted into an input terminal IN and a second mixer (MIX2) which converts down a first intermediate frequency fc of a signal outputted from the first mixer (MIX1) by using a second local frequency fd and a second intermediate frequency fe. The apparatus is also provided with a phase-locked loop (PLL), an automatic frequency controller (AFC) which comprises a second local oscillator and a low frequency band pass filter unit LPF adjusts a second local frequency fd, and a microcomputer discriminates an analog/digital distinction of the reception signal having the input frequency fa. Upon receiving an analog signal, the digital and analog reception apparatus deactivates a low-pass filter unit LPF, thereby having an AFC signal control a second local oscillator. On the other hand, upon reception of a digital signal, the phase-locked loop (PLL) and the low-pass filter unit LPF control the second local oscillator.