| 摘要 |
<p>Methods and apparatus for providing signal modulation or control of collector initialized and sustained field emission in field emitter devices without input circuit loading. A special control gate is used to modulate emission with no resultant steady-state emitter-gate current, thus increasing input resistance. The control gate may be well spaced from the emitter tip and the collector because it is not used to initiate and sustain emission form the emitter. This lowers emitter-gate and collector gate capacitances, thereby increasing input reactance for high frequency input signals. The collector-sustained field emission provides a low output resistance with relatively great collector-emitter spacing to provide high output reactance so that the high frequency response is extended. One practical embodiment of this invention employs an emission element (34) protruding through an annular control gate (42). Applications of this apparatus include display devices, mechanical pressure transducers and electron sources for laser materials.</p> |
