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:
Nov. 21, 2000
Filed:
Jun. 03, 1997
David A Kummer, Highlands Ranch, CO (US);
EchoStar Engineering Corp., Littleton, CO (US);
Abstract
This invention provides a method of generating multiple frequencies for use in a digital data transmission system including a remote transmitter and receiver. The reference frequency used in the transmitter is replicated in a remote receiver. A single crystal oscillator is used to generate a reference frequency similar to that used in the transmitter. The receiver reference frequency is manipulated by dividing the frequency into required multiple frequencies for use within the receiver. A constant comparison is made between the clock signal received in the transmitted data stream with the receiver reference frequency and the divisors are adjusted accordingly to maintain the clock frequency in the receiver within a predetermined tolerance range. This allows the output signal for display from the receiver to match the quality of the input display provided to the transmitter.