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:
May. 26, 1998
Filed:
Mar. 18, 1996
Sony Corporation, Tokyo, JP;
Abstract
A superheterodyne receiving circuit and a superheterodyne transmitting circuit are provided. A PLL forms a local oscillation signal in the receiving circuit, and a PLL forms a carrier signal in the signal transmitting circuit. A circuit converts digital data into signals suitable for transmission, and an oscillating circuit provides an oscillation signal. A frequency-dividing circuit forms a frequency-division signal of a reference frequency which is supplied to the PLLs by frequency-dividing the oscillation signal circuit, and a frequency-dividing circuit generates a clock signal required in the conversion circuit by frequency-dividing the oscillation signal. A frequency-dividing circuit forms a signal for descrambling the received voice signals which have been scrambled by frequency-dividing the oscillation signal, and a frequency-dividing circuit forms a signal for scrambling the voice signals to be transmitted by frequency-dividing the oscillation signal. In accordance with the invention, the essential circuitry of a cordless telephone set can be formed into a one-chip IC.