Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7015755 | Stacked modulator and automatic gain control amplifier A circuit arrangement that stacks a modulator and automatic gain control (AGC) amplifier so as to re-use the modulator output current to drive the AGC amplifier, thereby saving power consumption and avoiding an unnecessary signal transformation between the two stage... | 03/21/2006 |
| 6917632 | Interrupt driven wavelength locking In one embodiment of the present invention, an apparatus operates a control loop for a tunable optical device. A digital reference signal is converted to an analog reference signal and then introduced into the optical path of the tunable optical device. An analog fe... | 07/12/2005 |
| 6900752 | Stepwise zero-data-detection mute circuit A variable resistance device is disclosed, which comprises a first variable resistance circuit and analog switches, a second variable resistance circuit including series-connected first and second resistors, one terminal of the first resistor connected to one termin... | 05/31/2005 |
| 6810087 | Ultra-wideband communications system An ultra-wideband (UWB) communications system combines the techniques of a transmitted reference (TR) and a multiple access scheme called delay hopping (DH). Combining these two techniques using UWB signaling results in a penalty in signal-to-noise ratio (SNR) over ... | 10/26/2004 |
| 6768391 | Class-B biased gilbert cells and quadrature modulators Quadrature modulators include a quadrature splitter and a pair of Gilbert Multiplier Cells coupled to the quadrature splitter, each of which is biased in Class-B. The quiescent current bias in the Gilbert Multiplier Cells may be substantially zero. Each of the Gilbe... | 07/27/2004 |
| 6192070 | Universal modem for digital video, audio and data communications A universal modem has a software-configurable modulator/demodulator which accommodates different modulation formats such as those associated with terrestrial, cable, phone line, satellite and wireless communications to be transmitted and received through ... | 02/20/2001 |
| 5200715 | Waveform modulation and demodulation methods and apparatus A new method of modulating and demodulating signals and circuitry therefor is disclosed. The modulation circuit defines a non-linear voltage current transfer function wherein at low voltage levels the current voltage transfer function is substantially lin... | 04/06/1993 |
| 4613974 | Method and system for modulating a carrier signal A system and method for modulating a carrier signal wherein occurrence of the peaks in the modulated carrier signal conveys clocking information and each transition of a modulated carrier signal includes two midrange characteristics, the ratio of which re... | 09/23/1986 |
| 4577333 | Composite shift keying communication system A Composite Shift Keying (CSK) modulation technique is described which provides enhanced error detection capability in a noisy transmission medium, such as an AC power line. A modulating binary signal causes the generation of two of three possible transmi... | 03/18/1986 |
| 4571549 | 16-QAM Modulator with PLL amplification devices A 16-quadrature amplitude modulation (QAM) modulator for radio links converts a train of data into signals having a phase selected from sixteen predetermined phase values and an amplitude selected from four values. The modulator divides the data train int... | 02/18/1986 |
| 4553213 | Communication system A digital filtering system is provided for communicating and processing signals using a digital filter for signal separation and signal enhancement. A digital correlator is provided for generating high resolution output data in response to low resolution ... | 11/12/1985 |
| 4363130 | Binary digital communication system 1. A binary digital communication system comprising a transmitter and receiver: said transmitter comprising means for alternately radiating in response to the digits of a binary message two signals of non-periodic energy which have been delayed by a prede... | 12/07/1982 |
| 4324002 | Delay-modulated random energy intelligence communication system 1. An intelligence communication system comprising a transmitter and a receiver; said transmitter comprising non-periodic energy means for generating a carrier, means for effecting a change in the time or frequency domain of the carrier signal whereby a r... | 04/06/1982 |
| 4077021 | Method and arrangement for coding binary signals and modulating a carrier signal A method and structure for converting a sequence of binary digits into a sequence of discrete signal values, e.g., phase values, of a modulated carrier signal for data transmission. By introducing additional redundant signal values and coding information ... | 02/28/1978 |
| 4003002 | Modulation and filtering device A digital data transmitter is described, whose line carrier frequency need not be an integral multiple of one half the clock frequency of the digital input signal. Use is made of a digital filter for increasing the sampling frequency to a value which is t... | 01/11/1977 |
