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Flewelling
Gregory M. Flewelling, Merrimack, NH US
| Patent application number | Description | Published |
|---|---|---|
| 20110032022 | DIFFERENTIAL SWITCH WITH OFF-STATE ISOLATION ENHANCEMENT - Techniques are disclosed for reducing off-state leakage current in a differential switching device. The techniques can be embodied, for example, in a method that includes receiving a differential input signal at a differential input of each of a primary switch and a dummy switch. In an enabled-state of the device, the method further includes passing the differential input signal to a differential output of the primary switch. In a disabled-state of the device, the method further includes canceling off-state leakage current at the differential output of the primary switch, by virtue of the dummy switch having its differential output reverse-coupled to the differential output of the primary switch. The method may further include preventing the dummy switch from passing signals other than off-state leakage signals. The techniques can be embodied, for instance, in a switching device. | 02-10-2011 |
| 20110053541 | DYNAMIC RANGE ON-DEMAND FOR RECEIVER APPLICATIONS - Receiver power techniques are disclosed that allow for real-time adjustment of receiver dynamic range by virtue of supplied DC power, based on signal strengths currently received by the receiver. The disclosed techniques use real-time monitoring of receiver output to detect the presence of large signals, and to then adjust bias points in the receiver to reduce DC power consumption in the absence of large signals. By adapting the power to the current signal environment by autonomously adjusting the bias points, the mean power consumption of the receiver can be greatly reduced. This in turn has a number of benefits, such as increased battery life, decreased heat, increased circuit lifetime, and decreased noise figure. | 03-03-2011 |
| 20110133868 | Thermometer Coded Attenuator - Techniques are disclosed that allow for programmable attenuation using thermometer code steps. By thermometer coding the attenuator structure, monotonicity is guaranteed or otherwise greatly improved, which eliminates instability problems with automatic gain control loops and without the need for compensation or trimming. In addition, the thermometer coding technique also greatly reduces phase discontinuity between adjacent gain states. | 06-09-2011 |
Gregory M. Flewelling, Bedford, NH US
| Patent application number | Description | Published |
|---|---|---|
| 20100327941 | Transimpedance Amplifier Input Stage Mixer - A Gilbert cell mixer design is disclosed. Instead of using a differential transconductance stage as typically done, the design employs a differential transimpedance amplifier input stage. By utilizing a transimpedance input stage to the Gilbert mixer, feedback is used to obtain higher linearity without sacrificing noise performance. The transimpedance input stage supplies a current signal to the cascode connected Gilbert switching quad, so the transimpedance amplifier output is taken from the collector of the transimpedance amplifier output transistor, instead of the emitter as normally done with transimpedance amplifiers. | 12-30-2010 |
| 20100327998 | Thermometer Coded Attenuator - Techniques are disclosed that allow for programmable attenuation using thermometer code steps. By thermometer coding the attenuator structure, monotonicity is guaranteed or otherwise greatly improved, which eliminates instability problems with automatic gain control loops and without the need for compensation or trimming. In addition, the thermometer coding technique also greatly reduces phase discontinuity between adjacent gain states. | 12-30-2010 |
Neal Warren Flewelling, Toronto CA
| Patent application number | Description | Published |
|---|---|---|
| 20110089179 | Advanced household waste and recycling device and method - The present invention relates to an advanced device and method for operating household waste containers having wheels and hinged lids used for: garbage, recycling, and organic waste. According to the present invention one or more of the containers described are operated in a hands free manor when different types of waste are being sorted and deposited. The user activates a foot pedal assembly that opens one or more of the described containers. | 04-21-2011 |
Ross Flewelling, Oakland, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100261986 | MOTION COMPATIBLE SENSOR FOR NON-INVASIVE OPTICAL BLOOD ANALYSIS - A non-invasive optical sensor which uses the motion signal to calculate the physiological characteristic being measured. For pulse oximetry, a least squares or a ratio-of-ratios technique can be applied to the motion signal itself. This is made possible by selecting a site on the patient where variations in motion produce signals of two wavelengths which are sufficiently correlated. In particular, it has been determined that a sensor placed on a nail, in particular a thumbnail, exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation. | 10-14-2010 |