Published:2011/6/20 22:01:00 Author:Seven | Keyword: electronic valve, common-gate
The electronic valve difference common-gate phase-reversing circuit is shown in theabove figure.
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Published:2011/6/14 4:16:00 Author:Borg | Keyword: sawtooth wave, signal generator
The sawtooth wave signal generator, which consists of DAC08EQ, is simply constructed, and the signal waveform of the generator is highly precise, the generator is used in highly precise signal waveform circuits or instruments. See as the figure. (View)
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Published:2011/6/19 0:49:00 Author:Seven | Keyword: over-voltage, power-down
The 220V mains provide with a stable 12V working voltage through C1, VD1 and DW1, and VD3, R2 and RP1 compose a voltage distributing sampling circuit. When the mains voltage is normal, DW2 is blocked, the working voltage on 5-pin of TWH8778 is lower than 1.6V, the relay J is open, the mains provides power normally after crossing the J-1 commonly closed touch spot; when the mains voltage is high than the normal value, DW2 is breakdown and conducting, LEV on 5-pin of TWH8778 is rising to 1.6v, which reverses IC, and the 3-pin outputs a high LEV, the relay is closed and the power supply of the electric apparatus is cut off immediately. (View)
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Published:2011/6/13 23:38:00 Author:Borg | Keyword: temperature/pulse width converter
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Published:2011/6/13 23:37:00 Author:Borg | Keyword: voltage/frequency converter, linear sawtooth wave
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Published:2011/6/13 23:35:00 Author:Borg | Keyword: digit/time converter
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Published:2011/6/13 21:22:00 Author:Borg | Keyword: voltage/frequency converter
frequency-voltage converting relationship:
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Published:2011/6/13 21:19:00 Author:Borg | Keyword: current/frequency converter
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Published:2011/6/13 21:18:00 Author:Borg | Keyword: voltage/frequency converter, switching parameter
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Published:2011/6/13 21:15:00 Author:Borg | Keyword: voltage, pulse width, converter
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Published:2011/6/19 1:02:00 Author:Seven | Keyword: voltage steady circuit
The input voltage of the emitter output circuit is fixed at VZ, so the output voltage VO=VZ-VBE is also fixed. When the grid voltage is fluctuating, as VZ is almost still and VO is the same, the change of VI is adjusted by VCE, so the triode is called the adjusting pipe. When RL changes and it causes the fluctuation of IO, as lone as the △IZ is in the normal range of the stabilovolt tube, VZ will remains the same, i.e VO is almost stable.
The fluctuation of the circuit output current can be expanded to (1+β)△IZ, so it is also called the enlarging voltage stable diode circuit. (View)
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Published:2011/6/13 21:06:00 Author:Borg | Keyword: adjustable, symmetric triangular wave
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Published:2011/6/14 20:46:00 Author:Borg | Keyword: step-up, power supply
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Published:2011/6/13 21:01:00 Author:Borg | Keyword: linear sawtooth wave
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Published:2011/6/13 23:34:00 Author:Borg | Keyword: voltage/frequency converter
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Published:2011/6/19 2:47:00 Author:Seven | Keyword: machine tool, magnetic sucker, low-current
See as the circuit, the +24V is generated by stepping down the 110V power supply. When the touch spot JK of the magnetic sucker circuit is closed, the sucker is on and working, whose regulated current is 1.4A(the current of strong sucker is higher). At the moment, the sampling resistor which is serially connected in the electric sucker will have a 1.4v voltage drop, the dropped voltage is sampled by the potentiometer RP1 and imposed on the transistor VT1 input circuit, and then compound-magnified by VT1 and VT2. The multiple after being compounded by VT1 and VT2 is high.
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Published:2011/6/13 23:32:00 Author:Borg | Keyword: voltage/frequency converter
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Published:2011/6/13 23:33:00 Author:Borg | Keyword: voltage/frequency converter
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Published:2011/6/13 23:31:00 Author:Borg | Keyword: voltage/frequency converter
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Published:2011/6/13 20:55:00 Author:Borg | Keyword: sawtooth scanning voltage, linearity
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