Communications: directive radio wave systems and devices (e.g. – Base band system
Reexamination Certificate
2007-04-03
2007-04-03
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Base band system
C342S070000, C342S071000, C342S072000, C342S132000, C342S134000, C342S135000, C342S137000, C342S204000
Reexamination Certificate
active
11120770
ABSTRACT:
A method and apparatus for generating short electronic pulses using a modified differential trigger that is partly an analogue sinusoidal voltage and partly a selectable, DC voltage. The differential trigger is applied to a differential base band pulse generator having a NAND gate and AND gate. The trigger is applied to both NAND inputs and to one AND input. The NAND output is applied the other AND input. Such a circuit is an OFF state for all input states. However, as the input switches state, the NAND gate delay causes the AND gate to be ON briefly, generating a short pulse. The timing of this pulse can be controlled by varying the constant DC voltage. By using fast switching SiGe CML gates, short pulses with a controllable time off-set can be generated that are suitable for use in automotive radar applications, using only sub-GHz clocks.
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“A baseband processor for impulse ultra-wideband communications”, Blazquez, R.; Newaskar, P.P.; Lee, F.S.; Chandrakasan, A.P.; Solid-State Circuits, IEEE Journal of vol. 40, Issue 9, Sep. 2005 Ps:1821-1828.
Gresham Robert Ian
Jenkins Alan Peter
M/A-Com Inc.
Sotomayor John B.
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