| 摘要 |
PCT No. PCT/FI97/00277 Sec. 371 Date Mar. 27, 1998 Sec. 102(e) Date Mar. 27, 1998 PCT Filed May 7, 1997 PCT Pub. No. WO97/43831 PCT Pub. Date Nov. 20, 1997An emitter-coupled multivibrator circuit comprises two transistors (Q1, Q2), between which a positive feedback is provided by connecting each transistor base via buffer transistors (Q3, Q4) to the collector of the other transistor. In the multivibrator, the transistors (Q1, Q2, Q3, Q4) are connected to operating voltages via coils (L1, L2, L3, L4, L5, L6) instead of using conventional resistors and current sources. This lowers the necessary operating voltage, since no DC voltage loss is provided across the coils. Additionally, this improvement increases amplification during the avalanche process and thus the speed of the whole circuit. Further at high frequencies, the waveform of a signal is closer to a sinusoidal form. The speed of the circuit can be increased further by providing an electromagnetic coupling between the coils (L1, L2, L3, L4, L5, L6).
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