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| Number | Title | Issue Date |
| 7317354 | Inductor An inductor for a substrate of a circuit board includes a first electrical conductive layer and a second electrical conductive layer. The second electrical conductive layer is disposed over the first electrical conductive layer and is electrically connected to the f... | 01/08/2008 |
| 7302246 | Programmable gain amplifier with self-adjusting offset correction Briefly, in accordance with one embodiment of the invention, a calibration circuit may detect a difference between first and second outputs of a differential output programmable gain amplifier to determine a dc offset at the differential output. In the event an offs... | 11/27/2007 |
| 7268618 | Power amplifiers A method of controlling output power in a power amplifier having a driver stage and an output stage. The driver current is measured and the output stage biased in dependence upon the measured driver current. ... | 09/11/2007 |
| 7109791 | Tailored collector voltage to minimize variation in AM to PM distortion in a power amplifier A system is provided for substantially reducing variation in AM to PM distortion of a power amplifier caused by variations in RF drive power and temperature. The system includes power control circuitry and power amplifier circuitry. The power amplifier circuitry inc... | 09/19/2006 |
| 7045877 | Semiconductor protection device The invention is directed to improve resistance to destruction of a semiconductor device. A protection circuit having a plurality of bipolar transistors which are Darlington connected between outputs (collector and emitter) of an amplification circuit of a high outp... | 05/16/2006 |
| 6256482 | Power- conserving drive-modulation method for envelope-elimination-and-restoration (EER) transmitters A method and a circuit for high-efficiency linear RF-power amplification over a wide range of amplitudes from zero to peak output includes a final RF-power amplifier operating at or near saturation, an RF driver amplifier, a high-level amplitude modulator... | 07/03/2001 |
| 5111158 | Modulated voltage supply and fault monitoring thereof adapted for use in an RF power amplifier system An RF power amplifier system is disclosed having a modulated voltage supply and fault monitoring thereof. The modulated DC voltage supply receives an input voltage as well as a modulating signal, such as an audio signal, to provide a modulated voltage whi... | 05/05/1992 |
| 5093667 | T/R module with error correction A C-band transmit-receive module for an active aperture radar is provided employing gallium arsenide chips preferably manufactured by the Multifunction Self-Aligned Gate process and employing both open and closed loop error correction for both phase and a... | 03/03/1992 |
| 4973919 | Amplifying with directly coupled, cascaded amplifiers A signal is amplified with a plurality of amplifiers, each amplifier having a reference port, a reference node coupled to the reference port, and a signal port, and each amplifier being supplied by a power source with operating potential with respect to t... | 11/27/1990 |
| 4517528 | Amplifier circuit driven by ground isolated power supply Disclosed is an amplifier wherein, in order to prevent the mixing of hum and other noise from the ground potential of the amplifier, the driving power supply circuit of the amplifier is separated from the ground potential into a floating state. In additio... | 05/14/1985 |
| 4501979 | Current amplifier having multiple selectable outputs A current amplifier is provided having a single control amplifier and a plurality of output stages. The desired output stage is digitally selected. The ratios of the output stage currents may be selected during the metalization process. A single capacitor... | 02/26/1985 |
| 4079333 | Audio amplifier An audio amplifier which processes mainly dynamic signals and which is provided with a plurality of amplifying systems each having a preamplifier and a main amplifier. A plurality of power sources are used to separately supply electric power to the respec... | 03/14/1978 |
