Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7536005 | Ring detection and snoop circuit A ring detect circuit is shown that includes a regenerative latch configured to be coupled to a telephone line. The regenerative latch is configured to generate a fast transient signal in response to a ring signal on the telephone line. The latch is coupled to an is... | 05/19/2009 |
| 7502214 | Flexible hook switch driver circuit Disclosed is a switch driver circuit is shown where the circuit can control current driven devices and drive devices across a capacitive barrier. A mode control signal determines whether the circuit is in a current mode or a capacitive mode. In current mode, the cir... | 03/10/2009 |
| 7482666 | Apparatus and method for optical isolation An optoisolator device is shown having a die attachment device with a planar surface. A first circuit die has first and second planar surfaces and a first side surface. A receiver circuit and a first photodiode are formed on the first planar surface of the first cir... | 01/27/2009 |
| 7460497 | Two way serial communication The invention relates to a system of two-way packet-oriented serial communication between master and slave. Messages 20, 30 include status and request words 22, 32 which indicate the status of master and slave. Each of the master and slave determines f... | 12/02/2008 |
| 7405613 | Differential slope demodulator for low-IF frequencies A circuit and method for differential slope demodulator circuit are shown that utilize amplitude stabilizing of a frequency modulated signal to obtain an amplitude stabilized signal. Also shown is bandpass filtering of the amplitude stabilized signal for a first fre... | 07/29/2008 |
| 7365953 | Apparatus and method for emulating a component in a circuit A circuit and method for emulating a component in a circuit are shown that control a current controlled oscillator with a first current that is proportional to a square of a load current of the component and also charge and discharge a high precision capacitor using... | 04/29/2008 |
| 7363046 | Clear channel assessment A clear channel assessment procedure is described. The procedure includes setting a threshold value of signal strength. When a message is ready to transmit, the received signal strength intensity (RSSI) is measured, and compared with the threshold. If the received s... | 04/22/2008 |
| 7292092 | Tunable poly-phase filter and method for calibration thereof A resonator circuit is shown that is fabricated with substantially identical elements disposed symmetrically along an axis such that the circuit has a linear response to bias current. The alignment of the circuit permits multiple characteristics of the circuit to be... | 11/06/2007 |
| 7212068 | Tunable Sallen-Key filter stage and filter assembly Disclosed is a filter circuit assembly that includes a filter stage with a variable resistor and a resistor/capacitor (RC) oscillator. A controlling output of the RC oscillator controls the value of the variable resistor. The RC oscillator itself also includes a var... | 05/01/2007 |
| 7190933 | Method and apparatus for automatic tuning of a resonant loop antenna in a transceiver circuit Disclosed is a circuit and method for automatic tuning of a resonant circuit in a transceiver having a receiver and a transmitter that includes a power amplifier for driving the resonant circuit. During a transmit mode of the transceiver, a resonance voltage of the ... | 03/13/2007 |
| 7164377 | Multiplexed voltage reference strategy for codec A shared voltage reference circuit for a codec is shown that includes a voltage reference circuit for producing a reference voltage. A first sample and hold circuit has a first capacitor coupled to an output of the voltage reference circuit through a first switch co... | 01/16/2007 |
| 7164310 | Systems and apparatus for digital control of bias for transistors The present invention is directed toward a system and apparatus for digitally controlling a bias control signal for at least one transistor. The present invention provides for software writable registers that control the bias control signal. The present invention fu... | 01/16/2007 |
| 7139391 | DAA hook switch A hook switch circuit is shown wherein two high-voltage bipolar transistors, a PNP transistor Q1 and a NPN transistor Q2. that are connected in a regenerative feedback manner to form a bi-stable latch. The regenerative structure permits the use of low ... | 11/21/2006 |
| 7091713 | Method and circuit for generating a higher order compensated bandgap voltage A method and circuit are shown for generating a higher order compensated bandgap voltage is disclosed, in which a first order compensated bandgap voltage and a linearly temperature dependent voltage are generated. Thereafter, a difference between the linearly temper... | 08/15/2006 |
| 7086085 | Variable trust levels for authentication A level of trust is determined based on a combination of scores for one or more successful authentications. Scores indicate relative degrees of reliability for authentications, so that differing authentication methods may correspond to different scores. The determin... | 08/01/2006 |
| 7061319 | Apparatus and method for a low-voltage supply low-power variable gain amplifier A low-voltage supply low-power variable gain amplifier is shown that includes an input control circuit for receiving input signals, a variable gain amplifier (VGA) coupled to the input control circuit, and a circuit output terminal. A differential transconductor is ... | 06/13/2006 |
| 7058372 | Method and apparatus for automatic tuning of a resonant loop antenna Disclosed is a circuit and method for continuous automatic tuning of a resonant circuit. A resonance voltage of the resonant circuit is phase shifted by a predetermined phase shift Φ degrees and an input voltage signal to a power amplifier driving the resonant circ... | 06/06/2006 |
| 7031458 | Method and apparatus for isolation in a data access arrangement using analog encoded pulse signaling The present invention is directed toward a method and apparatus for transferring data across an isolation barrier using high speed analog encoded signals. A line side circuit interfaces with tip and ring contacts on one side of a capacitive isolation barrier that is... | 04/18/2006 |
