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, 1998
Filed:
Oct. 30, 1996
Patrick K Bailleul, Whittier, CA (US);
Harold L Zauss, Redondo Beach, CA (US);
Brent E Adams, Los Angeles, CA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A frequency discriminator circuit that includes a signal shaping and power splitting circuit (20) responsive to a sinusoidal RF input signal for providing first and second substantially identical squarewave outputs having the same frequency as the sinusoidal RF signal, a digital delay line (19) responsive to the first squarewave output for providing a delayed replica of the first squarewave output, an exclusive OR gate (21) responsive to the second squarewave output and the delayed replica of the first squarewave output, low pass filters (23, 25) for averaging each of the inverted and non-inverted outputs of the exclusive OR gate, and a differential amplifier (27) for subtracting the outputs of the low pass filters from each other and providing an output indicative of the frequency of the RF input signal.