| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Telephonic transmitter | US20691D | USRE20691E | 1938-04-05 | ||
| 162 | Modulator | US62375032 | 1932-07-21 | US2083336A | 1937-06-08 | CHARLES LUNNON FREDERICK; HUGHES WASSELL HAROLD JOSEPH |
| 163 | Operating point control for thermionic devices | US574435 | 1935-02-09 | US2079444A | 1937-05-04 | FYLER GEORGE W |
| 164 | Variable carrier system | US5597835 | 1935-12-24 | US2076787A | 1937-04-13 | LAPORT EDMUND A |
| 165 | Modulating carrier wave transmitter | US74767334 | 1934-10-10 | US2060614A | 1936-11-10 | THEODORE DITCHAM WILLIAM |
| 166 | Modulating system | US66429233 | 1933-04-04 | US2002209A | 1935-05-21 | NORDAHL JOHN G |
| 167 | Modulation | US69539633 | 1933-10-27 | US2000771A | 1935-05-07 | OTTO BOHM |
| 168 | Telephonic transmitter | US60860932 | 1932-05-02 | US1999143A | 1935-04-23 | LEO PUNGS |
| 169 | Carrier amplitude control system | US14505026 | 1926-10-29 | US1745415A | 1930-02-04 | GREEN ESTILL I |
| 170 | High-frequency signaling system | US7730525 | 1925-12-23 | US1691990A | 1928-11-20 | POTTER RALPH K |
| 171 | Signaling system | US12201626 | 1926-07-12 | US1684445A | 1928-09-18 | HONAMAN RICHARD K |
| 172 | Carrier amplitude-control system | US9802126 | 1926-03-27 | US1628883A | 1927-05-17 | HOLDEN WILLIAM H T |
| 173 | Method of and means for transmitting signals. | US7432916 | 1916-01-26 | US1243705A | 1917-10-23 | CARSON JOHN R |
| 174 | Method and system for down-converting and electromagnetic signal | US14814626 | 2015-07-31 | US09288100B2 | 2016-03-15 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses; Gregory S. Rawlins; Michael W. Rawlins |
| Methods for down converting a modulated carrier signal to a demodulated baseband signal are described herein. The method requires that a first portion of energy is transferred from the modulated carrier signal, and stored at a first storage device when a first switch is on. At least some of the energy stored in the first storage device is discharged when the first switch is off. The method further comprises transferring a second portion of energy from the modulated carrier signal, storing at a second storage device the second portion of transferred energy when a second switch is on, and discharging at least some of the energy stored in the second storage device when the second switch is off. A down-converted in-phase baseband signal portion is generated from the energy accumulated in the first storage device while both the charging and the discharging occurs, and a down-converted inverted in-phase baseband signal portion is generated from the energy accumulated in the second storage device while both the charging and the discharging occurs, and the two portions are combined with a first differential amplifier circuit to form a down-converted differential in-phase baseband signal. | ||||||
| 175 | Method and system for down-converting an electromagnetic signal | US14639310 | 2015-03-05 | US09246736B2 | 2016-01-26 | 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 for down converting a modulated carrier signal to a demodulated baseband signal are described herein. A first switch is controlled with a first control signal Which comprises a first sampling aperture with a specified frequency, wherein the first switch is on during the first sampling aperture and wherein the first switch is off outside the first sampling aperture. A second switch is controlled with a second control signal which comprises a second sampling aperture and wherein the second switch is off outside the second sampling aperture. The first and second control signals each control a charging and discharging cycle of a respective energy storage element so that for each switch a portion of energy is transferred to the respective energy storage element when the respective switch is on during the charging cycle, and a portion of previously transferred energy is discharged during the discharging cycle for each respective switch when the switch is off. A down-converted in-phase baseband signal portion is derived from energy accumulated at said first energy storage element during both the charging and the discharging cycles for the first energy storage element and a down-converted inverted in-phase baseband signal portion is derived from energy accumulated at said second energy storage element during both the charging and the discharging cycles for the second energy storage element, and the two portions are combined with a first differential amplifier circuit to form a down-converted differential in-phase baseband signal. | ||||||
| 176 | OSCILLATOR CIRCUITS AND METHODS TO COMPENSATE FREQUENCY PULLING | US14741731 | 2015-06-17 | US20150381186A1 | 2015-12-31 | 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. | ||||||
| 177 | Methods and Systems for Down-Converting a Signal Using a Complementary Transistor Structure | US14751425 | 2015-06-26 | US20150295536A1 | 2015-10-15 | David F. Sorrells; Michael J. Bultman; Robert W. Cook; Richard C. Looke; Charley D. Moses, JR. |
| 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. | ||||||
| 178 | Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same, and Aperture Relationships | US14639296 | 2015-03-05 | US20150244551A1 | 2015-08-27 | 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. | ||||||
| 179 | Synthesizer for transmitter and digital amplitude modulator | US14196652 | 2014-03-04 | US09072175B2 | 2015-06-30 | Yoshihiko Takahashi; Yuuki Funahashi |
| According to one embodiment, a synthesizer for a transmitter includes a transformer, a plurality of core support units and a fixing member. The plurality of core support units includes a support plate, fixing unit and an insertion. The support plate supports a toroidal core around which the primary winding is wound. The fixing unit fixes the toroidal core to the support plate. The insertion portion is formed inside or around the toroidal core and into which the secondary winding is inserted. The fixing member includes a plurality of receiving portions to and from which the plurality of core support units are attached and detached. The plurality of receiving portions are formed along a direction in which the plurality of core support units are stacked. | ||||||
| 180 | Systems and methods for providing improved power performance in wireless communication systems | US12197681 | 2008-08-25 | US08644776B1 | 2014-02-04 | Dan Nobbe; Robert Broughton; Tero Ranta; James Swonger; R. Mark Englekirk |
| A power detection system is disclosed that determines a power level of a transmission signal. The power detection system includes an adjustable comparator circuit, an algorithmic state machine, and an output node. The adjustable comparator circuit receives the transmission signal and provides an adjusted transmission signal, and further compares the adjusted transmission signal to a reference signal. The algorithmic state machine iteratively adjusts the adjustable comparator circuit until the adjusted transmission signal is substantially close to the reference signal. The output node is coupled to the algorithmic state machine and provides an output signal that is responsive to the power level of the transmission signal and to the reference signal. | ||||||
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