| Patent Number |
Title Of Patent |
Date Issued |
| 7227341 |
Circuit for use with switched leg power supply |
June 5, 2007 |
| A circuit for use with a power supply coupled in a switched leg of, for example, a lighting circuit, is described. The circuit provides a low impedance near the zero crossing of the AC signal and a high impedance thereafter, thereby allowing the power supply to draw current that bypa |
| 6636117 |
Input/output buffer incorporating filter for powerline communications line |
October 21, 2003 |
| An improvement in a buffer for driving a signal onto a power line is described. The buffer includes a second order filter. With the improvement, the collector-to-emitter potential of an emitter follower is maintained constant to substantially reduce the distortion associated with bas |
| 6484018 |
Method and apparatus for defining and generating local oscillator signals for down converter |
November 19, 2002 |
| A method and apparatus for defining and generating a digital waveform such as used for the local oscillator for a down converter in a receiver is disclosed. The method and apparatus is particularly useful where the digital waveform is not an integer submultiple of a reference signal. A |
| 6442381 |
Method and apparatus for defining and generating local oscillator signals for down converter |
August 27, 2002 |
| A method and apparatus for defining and generating a digital waveform such as used for the local oscillator for a down converter in a receiver is disclosed. The method and apparatus is particularly useful where the digital waveform is not an integer submultiple of a reference signal. A |
| 6414968 |
Transmission and detection of data in a dual channel transceiver |
July 2, 2002 |
| A dual channel transceiver which operates at two different frequencies and which may be used in a network using older transceivers operating at a single frequency is disclosed. A pilot tone is transmitted by the transceiver when it is using the second channel to cause the older trans |
| 6295625 |
Error correcting using signal anomaly as a hint |
September 25, 2001 |
| A "hint" signal is developed which points to suspected erroneous bits in received data by examining anomalies in the signal. More particularly, a delta phase pointer which quantifies one of the anomalies is used. The realigning of an IQ pointer provides an additional anomaly which is |
| 6043635 |
Switched leg power supply |
March 28, 2000 |
| A power supply for operating from a switched leg of an AC power line is described. A switch provides current during the beginning of each AC half cycle to an inductor and charges a capacitor. When the switch is open, the inductor continues to charge the capacitor. During the time that th |
| 5828676 |
Method and apparatus for robust communication based upon angular modulation |
October 27, 1998 |
| A robust encoding and decoding system of the present invention for communicating binary information using angular modulation system is disclosed. Binary information to be transmitted is data words consisting of 8 data bits, a parity bit, and two additional coding bits at the end of t |
| 5701240 |
Apparatus for powering a transmitter from a switched leg |
December 23, 1997 |
| A power supply for operating from a switched leg of an AC power line and for powering a transmitter is described. A switch provides current during the beginning of each AC half cycle to an inductor and charges a capacitor. When the switch is open, the inductor continues to charge the |
| 5553081 |
Apparatus and method for detecting a signal in a communications system |
September 3, 1996 |
| In a communications system, an apparatus and method for detecting a valid signal from noise. An adaptive threshold is used to qualify a received signal. The adaptive threshold is set according to the number of false detects occurring within a given time interval. The number of false |
| 5471209 |
Sigma-delta converter having a digital logic gate core |
November 28, 1995 |
| A sigma-delta A/D converter having a digital logic gate core. The converter is comprised of a loop filter for shaping the converter's quantization noise spectrum. The loop filter is comprised of an unbuffered CMOS logic gate inverter which can be implemented by a gate array. A quantizer |
| 5463662 |
Apparatus and method for reducing errors in data caused by noise through use of blanking |
October 31, 1995 |
| An apparatus for snubbing or blanking digital signals representing a band of signals that includes an encoded carrier signal transmitted over a power line. An average signal level is compared with the instantaneous signal level to develop a blanking circuit control signal. Additionally, |
