51
Huntsinger Dean P: Analog harmonic rejecting phase detector. Collins Radio Company, October 17, 1972: US3699461 (13 worldwide citation)

An analog harmonic rejecting phase detector with even harmonic rejection achieved through a fundamental frequency, f.sub. r, phase detector section and rejection of the stronger odd harmonic signal content passed from the input signal through the fundamental frequency section. It includes a pluralit ...


52
Peterson Max E: Proportional digital control for radio frequency synthesizers. Collins Radio Company, May 23, 1972: US3665323 (13 worldwide citation)

A proportional digital control system for radio frequency synthesizers using binary coded decimal control to a frequency synthesizer tunable in contiguous small interval increasing or decreasing steps throughout the frequency bandwidth range of operation. A fine tune dial switch circuit generates a ...


53
Brown James L: Resistor-ladder circuit. Collins Radio Company, August 28, 1973: US3755807 (13 worldwide citation)

An accurate resistor-ladder circuit using field-effect transistor switches. The field-effect transistors have on-resistances related to each other by a power of two whereby the cumulative resistances of said ladder produce accurate digital-to-analog conversion. Advantageously, the related resistance ...


54
Hallford Ben R: Microstrip diode high isolation switch. Collins Radio Company, July 18, 1972: US3678414 (13 worldwide citation)

A shield enclosed microstrip circuit microwave multi-diode switch with undesired waveguide signal transmission minimized. Diodes are spaced and connective microstrip sections dimensioned for optimum signal isolation in the OFF state. Further, diode dc bias isolation is provided for multi-diode secti ...


55
Bruene Warren B, Bell Ross L: Orthogonal dipole antennas. Collins Radio Company, November 2, 1971: US3618105 (13 worldwide citation)

A drooping dipole antenna having a center combination supporting mast and indicator balun structure with the drooping dipoles electrically close to the ground and part of the guy support system for the antenna effective primarily in the skywave mode of operation, but also producing a useful vertical ...


56
Melvin William J: Auto equalizer apparatus. Collins Radio Company, April 10, 1973: US3727134 (13 worldwide citation)

Circuitry for detecting and measuring distortion components in a differentially coherent phase shift keyed signal received at a receiver after transmission over a transmission facility and further circuitry for altering the amplitude and phase of the received signal by an amount indicative of the me ...


57
Leslie V Griffee: Dual band cavity backed antenna for radio navigation. Collins Radio Company Dallas TX, Henry K Woodward, Robert J Crawford, March 9, 1971: US3569971 (13 worldwide citation)

A radio navigation antenna operable in either the P communication band or the L communication band. A housing mountable in a rotatable support means in the body of an aircraft accommodates a planar P band radiating element and a pair of L-band folded monopoles such that interference is minimized amo ...


58
Foster Jimmie L: Conversion principle-angle of attack to airspeed. Collins Radio Company, October 19, 1971: US3614036 (13 worldwide citation)

A conversion principle and implementation means for permitting linear airspeed input increments to be introduced into an angle of attack referenced control system for an aircraft by means of which the normal margin over stall speed controlled by the system, such as 1.3V.sub.s, may be increased by a ...


59
Steen Carl E: Automatic intensity control for electronic displays. Collins Radio Company, Anderson Richard W, Crawford Robert J, September 17, 1974: US3836797 (12 worldwide citation)

A pulsed waveform generation means with duty-cycle a function of ambient light intensity utilizes multivibrator means including a photo resistor to vary coupling time constant such that on-time half-cycle durations vary with ambient light. The waveform is usable in conjunction with bi-level logic me ...


60
Terry D Canning, Richard L Jaycox: Combined performance and command indicator. Collins Radio Company Cedar Rapids IA, Richard W Anderson, Robert J Crawford, November 16, 1971: US3621210 (12 worldwide citation)

Visual annunciation of predetermined scale segments of a performance indicator of the type comprising a zero or reference index and performance indications either side of the reference is utilized to combine a dynamic visual command indication with a performance monitoring indication. Annunciation m ...