| Supertex, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110133841 | Low Noise Binary-Coded Gain Amplifier And Method For Time-Gain Compensation In Medical Ultrasound Imaging - A low noise variable gain amplifier and method for processing received signals in an ultrasound medical imaging system is disclosed. Unlike solutions known from the prior art, the signals are amplified by a binary-coded gain amplifier having its amplification factor progressively increased during the penetration of the transmitted pulse into a patient's body. This allows enhancing both the system dynamic range and Signal to Noise Ratio. | 06-09-2011 |
| 20100231279 | Phase Shift Generating Circuit - A phase shift generation circuit has an edge detector, which receives an input pulse signal and outputs a first and a second edge signal denoting the time of occurrence of the first and second edges of the input pulse signal. The circuit also has a divide by N circuit, which receives a first clock signal and a group of signals representing a number N, and outputs a second clock signal, said a second clock signal having a frequency equal to the frequency of said first clock signal divided by the number N. The circuit further comprises a pulse counter, which receives the first edge signal and the second clock signal, and outputs a group of signals representing the number of the second clock pulses between occurrences of the first edge signal. The circuit has a first recycling timer, which receives the number of second clock pulses, the first edge signal and the first clock signal, and outputs a group of pulses approximating a uniformly spaced group across the time duration of the period of the input pulse. The group is spaced by the number of second clock pulses. The circuit also has a second recycling timer, which receives the number of second clock pulses, the second edge signal and the first clock signal, and outputs a group of pulses approximating a uniformly spaced group across the time duration of the period of the input pulse. The group is spaced by the number of second clock pulses. The circuit also comprises at least one flip flop with set and reset inputs. The set input receives a pulse from the second recycling timer, while the reset input receives a corresponding pulse from the first recycling timer. The flip flop generates a phase shifted output pulse. | 09-16-2010 |
| 20100123520 | Low Noise Binary-Coded Gain Amplifier and Method for Time-Gain Compensation in Medical Ultrasound Imaging - A low noise variable gain amplifier and method for processing received signals in an ultrasound medical imaging system is disclosed. Unlike solutions known from the prior art, the signals are amplified by a binary-coded gain amplifier having its amplification factor progressively increased during the penetration of the transmitted pulse into a patient's body. This allows enhancing both the system dynamic range and Signal to Noise Ratio. | 05-20-2010 |
| 20090153208 | Pulse Width Modulation Driver for Electroactive Lens - An electroactive lens driver generates a variable root-mean-square drive voltage for controlling an electroactive lens by controlling the duty cycle of a modified square wave. | 06-18-2009 |
| 20090110384 | Inductorless Electroactive Lens Driver and System - An electroactive lens driver comprises a voltage generator generating a high alternating current voltage signal for application to an electroactive lens in response to a low direct current voltage signal. The voltage generator does not include an inductor or a transformer. | 04-30-2009 |
| 20080242987 | Method and Apparatus for Transducer Excitation in Medical Ultrasound Imaging - A method of transducer excitation in medical ultrasound imaging. Based on a stepped approximation of Gaussian modulated cosines, the transmit waveform provides bandlimited spectrum and low level of second order harmonics while retaining the duration of the transmitting within two carrier cycles. The waveform is constructed as a linear composition of four unipolar, rectangle pulses of unity amplitude. Furthermore, the described embodiment supports digitally controlled transmit apodization and focusing. | 10-02-2008 |
