| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | Carrier wave signaling system | US5876536 | 1936-01-11 | US2167535A | 1939-07-25 | ERIC STRONG CHARLES; CHARLES MCLEAN FRANCIS |
| 102 | Method of controlling high frequency transmitters | US1946935 | 1935-05-02 | US2137629A | 1938-11-22 | ERICH SCHULZE-HERRINGEN |
| 103 | Carrier wave modulation system | US12579637 | 1937-02-15 | US2128285A | 1938-08-30 | HENRY CLOUGH NEWSOME; ERNEST GREEN |
| 104 | Method of modulating high frequency transmitters | US28335 | 1935-01-03 | US2127148A | 1938-08-16 | HANS WEHRLIN |
| 105 | Modulating system | US75963534 | 1934-12-29 | US2070666A | 1937-02-16 | LLEWELLYN FREDERICK B |
| 106 | Transmitting system | US50843731 | 1931-01-13 | US2063278A | 1936-12-08 | WEDEL CARL J R H VON |
| 107 | Modulated carrier wave transmitter | US67886033 | 1933-07-03 | US2051493A | 1936-08-18 | CHARLES LUNNON FREDERICK; HERBERT TRUMP EDWARD |
| 108 | Modulating system | US73640334 | 1934-07-21 | US2041951A | 1936-05-26 | JOZEF PLEBANSKI |
| 109 | Carrier wave signaling system | US67185733 | 1933-05-19 | US2032312A | 1936-02-25 | RING ANDREW D |
| 110 | Telephony and telegraphy signaling device | US66087733 | 1933-03-15 | US1955095A | 1934-04-17 | WILHELM RUNGE |
| 111 | Signaling method and means therefor | US31024028 | 1928-10-04 | US1858810A | 1932-05-17 | BRAAM ROBERTS WALTER VAN |
| 112 | Carrier-amplitude control in radio systems | US7864925 | 1925-12-31 | US1744836A | 1930-01-28 | OHL RUSSELL S |
| 113 | Electrical signaling | US14516926 | 1926-10-30 | US1715645A | 1929-06-04 | DICKIESON ALTON C |
| 114 | Vacuum-ture radiotransmitter | US67658223 | 1923-11-23 | US1626744A | 1927-05-03 | GERHARD MESSTORFF |
| 115 | Methods and systems for down-converting a signal | US14751425 | 2015-06-26 | US09319262B2 | 2016-04-19 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses, Jr. |
| Methods, systems, and apparatuses for down-converting a modulated carrier signal to a demodulated baseband signal by sampling a portion of the energy of the carrier signal are described herein. Briefly stated, such methods systems, and apparatuses operate by receiving a modulated carrier signal and using a control signal to control a switch or switches so as to transfer a portion of the energy from the modulated carrier signal in the form of charge to a storage capacitor during a plurality of aperture periods and to discharge the charge in the storage capacitor into a load during the time between the plurality of aperture periods. The demodulated baseband signal is generated—during both the charging and the discharging of the storage capacitor based on the energy accumulated at the storage capacitor as a net result of previous charging and discharging of the storage capacitor. | ||||||
| 116 | Oscillator circuits and methods to compensate frequency pulling | US14741731 | 2015-06-17 | US09257996B2 | 2016-02-09 | Angelo Scuderi; Antonino Calcagno; Salvatore Scaccianoce |
| An oscillator circuit may include a local oscillator to generate a carrier signal having a tunable frequency, a first modulator and a power amplifier coupled in cascade to the local oscillator to generate an output signal. The first modulator may be activated from a first modulating signal having a first frequency alternatively defining ON and OFF states of the first modulator. An estimator unit may receive the carrier signal during a time window and detect an estimated frequency variation of the carrier signal during the ON and OFF states. A compensation unit may include a second modulator to generate a compensation signal proportional to the estimated frequency variation and modulated with a second modulating frequency. The second modulating frequency may be substantially the same as the first modulating frequency, and the compensation signal may be added to a bias signal of the local oscillator to tune the tunable frequency. | ||||||
| 117 | Methods and Systems for Down-Converting a Signal Using a Complementary Transistor Structure | US14815505 | 2015-07-31 | US20160020938A1 | 2016-01-21 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses |
| Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal is described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing rate. The EM signal is aliased according to the aliasing signal to down-convert the EM signal. The term aliasing, as used herein, refers to both down-converting an EM signal by under-sampling the EM signal at an aliasing rate, and down-converting an EM signal by transferring energy from the EM signal at the aliasing rate. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a demodulated baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal. | ||||||
| 118 | Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same, and Aperture Relationships | US14814626 | 2015-07-31 | US20150341196A1 | 2015-11-26 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses; Gregory S. Rawlins; Michael W. Rawlins |
| Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal. | ||||||
| 119 | Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same, and Aperture Relationships | US14639366 | 2015-03-05 | US20150312085A1 | 2015-10-29 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses; Gregory S. Rawlins; Michael W. Rawlins |
| Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal. | ||||||
| 120 | Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships | US14172392 | 2014-02-04 | US09118528B2 | 2015-08-25 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses; Gregory S. Rawlins; Michael W. Rawlins |
| Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal. | ||||||
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