| 摘要 |
PURPOSE:To facilitate the monolithic IC formation of the video output step, by securing the connection between the output end of the video output step and the cathode of the BRaun tube as well as between the phase inverse output step and the grid of the Braun tube each and then driving the video output step with the low voltage. CONSTITUTION:The video signal of the positive polarity is applied to amplifying step 2 from input terminal 1 to be then amplified, and then applied to one transistor TR8 forming differential amplifier 7. And the signal amplified through TR8 is applied to the cathode of Braun tube 5 in the form of the video signal of the negative polarity and via emitter-follower step 9 and coupling capacitor 10 each. At the same time, the video signal of the positive polarity supplied from the collector of the other TR11 of amplifier 7 is applied to the grid of tube 5 via emitter-follower step 12 and coupling capacitor 13 each. Then amplitudes e1 and e2 are lowered for the bipolar video signal to be applied to tube 5, thus facilitating the monolithic IC formation of the video output step. |
