| 摘要 |
#CMT# #/CMT# The generator has a coding table (4) containing sets (SM1-SM4) of digital words (M11-M18, M12-M28, M31-M38, M41-M48) and supplying the words (M12-M28) of the set (SM2) that is selected based on configuration of information elements contained in an addressing circuit (3). An amplitude modulator (2) is in the form of a digitally controlled amplifier whose gain is controlled by the words from the table. The selected word set codes events by amplitude variations to reduce bandwidth of pulses from the generator. The events are formed by an identity and dissimilarity of the information elements. #CMT# : #/CMT# An independent claim is also included for a method for transmitting digital data by ultra wide band pulse. #CMT#USE : #/CMT# Ultra wide band pulse generator for transmitting ternary digital data. #CMT#ADVANTAGE : #/CMT# The selected digital word set codes the events by the amplitude variations to reduce bandwidth of pulses from the generator, thus avoiding the need for band pass filter, and hence reducing cost and complexity of the pulse generator. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a circuit diagram of an ultra wide band pulse generator. M11-M18, M12-M28, M31-M38, M41-M48 : Digital words SM1-SM4 : Sets of digital words 2 : Amplitude modulator 3 : Addressing circuit 4 : Coding table 5 : Phase modulator. |
