Electronic frequency ratio generator

• US 3,419,820 A
• Filed: 12/06/1965
• Issued: 12/31/1968
• Est. Priority Date: 12/06/1965
• Status: Expired due to Term

• Current Assignee: Houchang Handjani
• Original Assignee: Houchang Handjani
• Inventors: HOUCHANG HANDJANI
• Application Number:
  US04/511,883
• Time in Patent Office: 1,121 Days
• US Class Current: 363/163
• CPC Class Codes: F02C 7/00 Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants controlling F02C9/00
• CPC Class Codes: G01H 1/10 of torsional vibrations
• CPC Class Codes: G01H 3/00 Measuring characteristics of vibrations by using a detector in a fluid G01H7/00, G01H9/00, G01H11/00 take precedence
• CPC Class Codes: G01M 15/00 Testing of engines
• CPC Class Codes: G01N 29/04 Analysing solids using acoustic emission techniques G01N29/14
• CPC Class Codes: G01R 23/00 Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
• CPC Class Codes: H03B 21/025 by repeated mixing in combination with division of frequency only
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Claims

1. A FREQUENCY RATIO GENERATOR FOR PRODUCING AN ELECTRICAL SIGNAL OF FREQUENCY THAT CONTINUOUSLY BEARS A PREDETERMINED NUMERICAL RATIO TO A SLOWLY VARYING FREQUENCY OF A PURE TONE SIGNAL, COMPRISING A SOURCE OF HIGH FREQUENCY SIGNALS, A DOUBLE SIDE-BAND MODULATOR RESPONSIVE TO SAID PURE TONE SIGNAL AND OPERABLY CONNECTED WITH THE SOURCE OF HIGH FREQUENCY SIGNALS FOR MIXING THE PURE TONE SIGNAL WITH A LOCAL HIGH FREQUENCY SIGNAL FROM THE SOURCE, THE OUTPUTS OF SAID MODULATOR CONSISTING OF A MAIN SIGNAL OF THE SAME FREQUENCY AS SAID LOCAL SIGNAL AND UPPER AND LOWER SIDE-BAND SIGNALS OF FREQUENCIES DETERMINED BY THE FREQUENCY OF THE PURE TONE SIGNAL, SIGNAL PROCESSING MEANS CONNECTED WITH THE SIDE-BAND MODULATOR AND SAID SOURCE OF HIGH FREQUENCY SIGNALS FOR RECEIVING A SECOND HIGH FREQUENCY SIGNAL FROM THE SOURCE OF HIGH FREQUENCY SIGNALS AND INCLUDING MULTISTAGE SIGNAL MIXING AND BINARY DIVIDING MEANS, AND ALSO SWITCHING MEANS BETWEEN THE MODULATOR AND THE MULTI-STAGE SIGNAL MIXING AND BINARY DIVIDING MEANS FOR SELECTIVELY CONNECTING RESPECTIVE STAGES OF SAID PROCESSING MEANS TO CERTAIN MODULATOR OUTPUTS ACCORDING TO THE BINARY REPRESENTATION OF SAID NUMERICAL RATIO FOR PRODUCING AT THE OUTPUT STAGE A SIDE-BAND SIGNAL CONTAINING THE AFORESAID SIGNAL OF PREDETERMINED RATIO FREQUENCY.