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| Number | Title | Issue Date |
| 5632909 | Filter A full duplex radio having improved properties is obtained by using asymmetric surface acoustic wave (SAW) filters, the filters are composed of series and parallel coupled SAW resonators. Asymmetry is obtained by covering either of the series or parallel ... | 05/27/1997 |
| 5585592 | Shock tolerant fuze A shock tolerant fuze includes a detector for determining when fuze timing should be initiated, a movable safe and arm assembly containing a time delay circuit and a firing aperture. The firing train detonator is preferably also mounted on the movable arm... | 12/17/1996 |
| 5339459 | High speed sample and hold circuit and radio constructed therewith A sample and hold circuit is formed within an integrated circuit and has a small, substantially linear hold capacitance. The circuit includes a sampling switch, a hold capacitor, and a buffer amplifier. The buffer amplifier includes a common drain FET and... | 08/16/1994 |
| 5309126 | Spatially varying multiple electrode acoustic wave filter and method therefor An electronic apparatus for receiving and filtering high frequency waves comprises a sequence of T electroacoustic transducers each having multiple interdigital electrode fingers and a centerline located equidistant between its outermost electrode fingers... | 05/03/1994 |
| 5307379 | Automatic noise characterization for optimally enabling a receiver A multi-channel receiver automatically determines the noise floor of each channel and resets the channel threshold based thereon while avoiding undesirable bias from weak non-noise signals. The power probability of uncharacterized input signals (non-noise... | 04/26/1994 |
| 5303418 | High isolation mixer A method and apparatus for improved isolation of IF, LO, and RF frequency signals from the non-associated mixer ports (e.g., avoiding introducing RF frequency signals at the IF and LO ports, and similarly vis-a-vis other signals and ports), is provided by... | 04/12/1994 |
| 5278873 | Broadband digital phase aligner Automatic dynamic phase alignment of digital data, skewed with respect to a local clock, is obtained over a wide range of skew and skew frequencies. The system includes (i) an edge detector (52) containing predetermined delays (e.g., D1, D2, D3), (ii) del... | 01/11/1994 |
| 5270606 | Processing robust acoustic reflectors A reflector arrangement for an acoustic wave device comprises an acoustic wave propagating substrate, reflection elements having at least two different widths separated by at least one gap breadth disposed on the acoustic wave propagating substrate. The a... | 12/14/1993 |
| 5221928 | Method and apparatus for accurate, high speed pulse-echo measurement calibration An apparatus comprises a signal input and a sampler and analog-to-digital (A/D) converter coupled to the signal input. The sampler and A/D converter forms a digital pre-look signal from an input signal. The apparatus further comprises a digital memory cou... | 06/22/1993 |
| 5179591 | Method for algorithm independent cryptographic key management An apparatus for secure communications contains a controller for automatically selecting one of several data ciphering means utilizing one of a plurality of ciphering algorithms common to transmitting and receiving terminals. A transmitting means for tran... | 01/12/1993 |
