Published:2011/4/2 3:58:00 Author:Ecco | Keyword: digital circuit , synchronous 6 , binary coefficient, multiplier
Executive fixed coefficient or variable coefficient fractional frequency: typical highest clock frequency 32MHz; When clearing, choose input for low level, counter begins the work, the output frequency equals to input frequency multiplied by input coefficient divided by 64.
H is high level, L is low level, X is uncertain, others are digital reading. 1. This is a simple chart to show the clearing function. The state of clock and strobe will make an influence on the logic level of Y and Z. For example, the unit /cascade is in low level, the output will keep high level. 2. The coefficient in input terminal is constant or variable coefficient input. 3. The unit/cascade is not allow to output Y. (View)
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Published:2011/4/5 22:49:00 Author:Ecco | Keyword: digital circuit, 4 input , expander
74H62 4 input AND-OR expander
X=AB+CDE+FGH+IJ(when connecting to the X input terminal of 74H50, 74H53 or 74H55)
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Published:2011/4/5 22:48:00 Author:Ecco | Keyword: digital circuit, hex current-reading, interface gate
74LS63 hex current-reading interface gate
Y=A; The input current in low level becomes output voltage, the input current in high level becomes output voltage; The input current is lower than 50μA, the output is in low level, the input current is higher than 200μA, the output is in high level. (View)
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Published:2011/4/14 2:28:00 Author:Ecco | Keyword: series input , voltage feedback
The figure 17-1 shows the basic form of the first-stage amplifier series input voltage feedback circuit.
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Published:2011/4/12 22:01:00 Author:Nicole | Keyword: digital counter
555 timer is used as clock to drive RS7490 decimal timer, BCD output to 7 section LED. To adjust R1 can change the clock frequency. (View)
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Published:2011/3/30 22:06:00 Author:may | Keyword: Shunt regulator
This circuit use two intergrated regulator 7058 parallel connection, every voltage regulator circuit input side all switch-in 0.1µF capacitor to clear high frequency oscillation. (View)
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Published:2011/4/1 22:27:00 Author:may | Keyword: 2.2~6V, output 7V, voltage booster
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Published:2011/3/31 22:37:00 Author:may | Keyword: time base window
7207A crystal controlled timer, generate three precise gating window: 10ms, 100ms and 1s. They can use as time base of cymometer ( such as 7208) , sanction time scale or gating timmer signal.
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Published:2011/3/31 21:24:00 Author:may | Keyword: integrated voltage stabilizer, parallel expansion
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Published:2011/4/2 1:03:00 Author:may | Keyword: 1024 bit, support drive
The diagram is drive circuit which is support to 1024 bit CCPD. It can used for drive of 1024 bit CCPD if change 64 frequency division of LS393 to 128 frequency division. The frequency of quartz crystal unit J1 can change according to actual need at the range of 0.5~10MHz. Two Vs of CCPD is signal output end. Jr is reset pulse exit side. JT is line synchronizing pulse side.
(Liu banghan)
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Published:2011/3/21 0:38:00 Author:muriel | Keyword: 1,024 bits, CCD drive circuit
This figure is NEC's uPD795 type 1024bits CCD drive circuit,In the chip hassample hold circuit. And can work at 5V drive pulse. (View)
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Published:2011/4/2 1:40:00 Author:may | Keyword: 12 or 24h, clock
AMIS1736 clock chip is produced by American Microsystems company. It can drive LCD directly. The display equipment can display 24h or display 12h coupled with AM/PM mark (Mornings And Afternoons) if only we we change three connections.
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Published:2011/4/14 3:44:00 Author:Nicole | Keyword: UPS-500W
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Published:2011/4/14 4:01:00 Author:Nicole | Keyword: internal structure
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Published:2011/4/14 4:16:00 Author:Nicole | Keyword: functional block diagram
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Published:2011/4/13 3:26:00 Author:Nicole | Keyword: IGBTNPT, parasitic component
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Published:2011/4/13 3:30:00 Author:Nicole | Keyword: internal structure
MIC79050-4.2BS is a precise LDO linear regulated power supply, the output voltage is 4.2V. (View)
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Published:2011/3/30 2:21:00 Author:muriel | Keyword: adjustable , constant flow source
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Published:2011/4/13 21:53:00 Author:may | Keyword: Inverter
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Published:2011/4/13 21:51:00 Author:may | Keyword: Inverter
simple and practical inverter power supply circuit (View)
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