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. 23, 1984
Filed:
Nov. 19, 1982
Noel A Rogers, Shawnee Mission, KS (US);
Other;
Abstract
Disclosed is an electronic channel selector comprising a plurality of diodes in series with a plurality of crystals, each diode/crystal connection defining one channel of the ten channel crystal-controlled oscillator. Non-enabled diodes are maintained in a reverse bias condition, preventing the associated crystal from oscillating in the oscillation circuit. The diode corresponding to the selected channel is forward biased into conduction permitting the associated crystal to control the oscillator circuitry providing the desired frequency output. When the selected diode is forward biased and begins conducting current, it conducts current through a path which provides a tuning voltage which may advantageously be utilized in a transmitter exciter filter or receiver preselector. A binary switch is manually set for the desired channel and produces a binary coded output. A binary-to-decimal decoder provides a single enabling output which is determined by the binary code supplied from the binary switch. The decoder output is inverted and forward biases the diode corresponding to the selected channel.