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. 27, 1992
Filed:
Sep. 07, 1990
Naoki Ejima, Osaka, JP;
Kinji Kawamoto, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A data recording apparatus includes a digital input processing circuit, an analog input processing circuit including an A/D converter for recording the analog input signal in digital form, a switch for selecting either digital or analog input signals for recording, and a control circuit. Normally, the apparatus records the digital input signal. When the digital input processing circuit detects a synchronizing error or inhibition of recording the digital input signal (digital copy) by analyzing the sub-code signal of the digital input signal, the control circuit controls the selecting switch so as to select the analog input signal. In order to reduce unnatural level variation due to change of selection between the digital and analog input signals, there are further provided a polarity change circuit, variable delay, and variable gain amplifier for the analog audio signal.