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:
Jun. 10, 1980
Filed:
Mar. 20, 1978
Aristotelis S Arvanitis, Addison, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A two-pole fixed-tuned monolithic crystal frequency discriminator circuit is provided wherein a tuned circuit is utilized connected between the center pin of the two-pole crystal device and ground. In this manner, two bandpass filters are effectively provided wherein the respective outputs thereof may be rectified and combined so as to obtain the desired audio output. The result is a two-pole discriminator device with the linear portion of the conventional 'S' curve having a substantially wider response characteristic than for any heretofore known monolithic crystal discriminator. Additionally, it does not need further tuning adjustments and it exhibits substantially better temperature stability and small size as well as a cost saving in manufacture as compared to a comparable three-pole device.