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| Number | Title | Issue Date |
| 7386075 | Apparatus for and method of optimizing the performance of a radio frequency receiver in the presence of interference An apparatus for and method of extending the dynamic range of a RF communications receiver. The invention provides a mechanism for controlling the gain of both the LNA and down conversion mixer in the front end portion of an RF receiver. Both the LNA and the mixer a... | 06/10/2008 |
| 7323922 | Digitally controlled gain stage having an analogue control input A signal processing system has a first, digitally controlled, gain element, a second, analogue controlled, gain element and a gain control unit configured to receive a gain request signal and to generate a first gain control signal to be input to the first gain elem... | 01/29/2008 |
| 7266360 | Low noise amplifier for wireless communications A low noise amplifier is provided for the receiver of a wireless communications system. The amplifier incorporates an image rejection function by incorporating a notch filter formed by an inductor and capacitor connected at a node between two active elements of the ... | 09/04/2007 |
| 6952159 | Coupling device A coupling apparatus (1) having a mains connection (2) for connection to a low-voltage mains power supply system, and having an appliance connection (3) for connection of any appliance for transmitting and/or receiving an RF signal has a voltage... | 10/04/2005 |
| 6710662 | Power amplifier with improved linearity and reduced transistor stacks A power amplifier includes drains and sources of a plurality of transistors connected to each other to produce a plurality of common drains and a plurality of common sources, wherein the common drains are connected at a common drain point and wherein the common drai... | 03/23/2004 |
| 5276921 | Transmitter with nonlinearity correction circuit A feedback loop is composed in which a part of a transmission signal obtained by amplifying a modulation carrier signal by a power amplifier is taken out by a monitor circuit, and is detected by an envelope detector, and a distortion-free envelope signal ... | 01/04/1994 |
| 5272449 | Vertical amplifier system for multitrace oscilloscope and method for calibrating the same A vertical amplifier system for a multitrace oscilloscope including a first and a second variable gain amplifiers each connected to each channel of a multitrace oscilloscope. First, a first reference voltage is fed to the two variable gain amplifiers at t... | 12/21/1993 |
| 5204637 | Power detection technique for automatic amplifier power control A controlled-output power amplifier (50) is provided having a wide dynamic range in a plurality of output power levels. The controlled-output amplifier (50) includes an amplifier (12) for receiving an input signal (14) and for providing an output signal (... | 04/20/1993 |
| 5101175 | Power control method for a voltage controlled power amplifier and circuitry used in the method In a digital radio telephone transmitter an output pulse with e.g. cos2 -shaped edges is produced by a voltage controlled power amplifier (4). When known control loop circuitry is used, the power (Pout) of the output pulse will rise almost step... | 03/31/1992 |
| 4754230 | Compandorized system clipping suppressing arrangement The clipping suppression arrangement for a compandorized communication system, includes a limiter peak level detector for causing the gain of an input amplifier to be reduced quickly when a compressed output is driven toward a clipping output condition.... | 06/28/1988 |
| 4277755 | Circuit arrangement for driving nonlinear threshold devices A nonlinear signal transducer U, such as a light-emitting diode or a semiconductive laser, is maintained at a suitable operating point by a constant biasing current and receives an electrical input signal by way of a series resistor R from a main amplifie... | 07/07/1981 |
| 4189973 | Electronic expression control An electronic organ in which a manually adjustable potentiometer varies the control voltage supplied to a voltage controlled amplifier interposed between a source of tone signals and an organ output circuit with the potentiometer being connected to the am... | 02/26/1980 |
