Amplitude equalizer of speech sound waves

• US 3,265,983 A
• Filed: 01/30/1964
• Issued: 08/09/1966
• Est. Priority Date: 01/30/1964
• Status: Expired due to Term

• Current Assignee: Meguer V. Kalfaian
• Original Assignee: Meguer V. Kalfaian
• Inventors: Kalfaian, Meguer V.
• Application Number:
  US04/341,240
• Time in Patent Office: 922 Days
• US Class Current: 330/123
• CPC Class Codes: H04B 1/64 Volume compression or expansion arrangements

Claims

1. AN ARRANGEMENT FOR SYMMETRIC AMPLITUDE CONTROL OF COMPLEX WAVES HAVING A SYMMETRIC OPPOSITELY POLED PEALS, WITHOUT PEAK WAVE DISTORTION, THE ARRANGEMENT COMPRISING A PUSH-PULL AMPLIFIER HAVING FIRST AND SECOND BRIDGE CIRCUITS INPUTS AND AN OUTPUT;

EACH OF SAID FIRST AND SECOND BRIDGE CIRCUITS COMPRISING A CENTER TAPPED IMPEDANCE MEANS HAVING TWO END TERMINALS CONNECTED TO THE TWO END TERMINALS OF A SERIES-CONNECTED VARIABLY-CONTROLLABLE RESISTIVE ELEMENT AND A FIXED-VALUE RESISTOR, RESPECTIVELY, FOR FORMING SAID FIRST AND SECOND BRIDGE INPUTS BY COUPLING THE JUNCTION TERMINALS BETWEEN SAID FIXEDVALUE AND VARIABLY-CONTROLLABLE RESISTIVE ELEMENTS OF THE SAID FIRST AND SECOND IMPEDANCE MEANS TO THE SAID FIRST AND SECOND INPUTS, RESPECTIVELY, FROM COMMON PARALLEL-CONNECTION OF SAID CENTER TAPS, MEANS FOR GENERATING SAID COMPLEX WAVES, AND MEANS FOR APPLYING THESE WAVES IN PUSH-PULL MODE TO SAID FIRST AND SECOND IMPEDANCE MEANS, FOR AMPLIFYING SAID WAVES AT THE OUTPUT OF SAID AMPLIFIER;

A PHASE SHIFTING MEANS CONNECTED TO SAID OUTPUT, THE LAST SAID PHASE SHIFTING MEANS HAVING FIRST AND SECOND OUTPUT-TERMINALS;

FIRST AND SECOND UNIDIRECTIONALLY ENERGIZABLE NETWORKS, EACH HAVING A PREDETERMINED DECAYING BUT LIKE TIME-CONSTANT;

A REFERENCE AMPLITUDE LEVEL DETERMINING MEANS FOR SAID FIRST AND SECOND NETWORKS;

FIRST AND SECOND COUPLING MEANS BETWEEN SAID FIRST AND SECOND OUTPUT-TERMINALS AND SAID FIRST AND SECOND NETWORKS, RESPECTIVELY, FOR ENERGIZING SAID NETWORKS IN PROPORTIONAL MAGNITUDES WHEN THE PEAK AMPLITUDES OF THE PHASE SHIFTED PEAKS OF THE AMPLIFIED COMPLEX WAVES ARE ABOVE SAID REFERENCE LEVEL, AT SHIFTED TIME PERIODS THAN THE ARRIVAL OF LAST SAID PEAKS AT SAID OUTPUT;

MEANS FOR TRANSLATING SAID ENERGIZATION OF THE FIRST AND SECOND NETWORKS INTO FIRST AND SECOND CONTROLLING MEANS;

AND MEANS FOR VARYING SAID VARIABLY-CONTROLLING RESISTIVE ELEMENTS OF SAID FIRST AND SECOND BRIDGES BY SAID FIRST AND SECOND CONTROLLING MEANS, RESPECTIVELY, FOR SYMMETRICALLY COMPRESSING THE ADMITTANCE OF THE OPPOSITELY POLED PEAKS OF SAID GENERATED COMPLEX WAVES TO SAID OUTPUT, AND WITHOUT DISTORTION TO THE ORIGINAL WAVESHAPES OF SAID PEAKS BY VIRTUE OF SAID PHASE SHIFTED COMPRESSION.