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74 series digital circuit of 7497 synchronous 6 binary coefficient multiplier

Published:2011/4/2 3:58:00 Author:Ecco | Keyword: digital circuit , synchronous 6 , binary coefficient, multiplier

74 series digital circuit of 7497 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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74 series digital circuit of 74H62 4 input AND-OR expander

Published:2011/4/5 22:49:00 Author:Ecco | Keyword: digital circuit, 4 input , expander

74 series digital circuit of 74H62 4 input AND-OR expander
74H62 4 input AND-OR expander X=AB+CDE+FGH+IJ(when connecting to the X input terminal of 74H50, 74H53 or 74H55) (View)

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74 series digital circuit of 74LS63 hex current-reading interface gate

Published:2011/4/5 22:48:00 Author:Ecco | Keyword: digital circuit, hex current-reading, interface gate

74 series digital circuit of 74LS63 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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The series input voltage feedback

Published:2011/4/14 2:28:00 Author:Ecco | Keyword: series input , voltage feedback

The series input voltage feedback
The figure 17-1 shows the basic form of the first-stage amplifier series input voltage feedback circuit. (View)

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Digital counter demonstration circuit

Published:2011/4/12 22:01:00 Author:Nicole | Keyword: digital counter

Digital counter demonstration circuit
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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Shunt regulator circuit

Published:2011/3/30 22:06:00 Author:may | Keyword: Shunt regulator

Shunt regulator circuit
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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2.2~6V output 7V voltage booster circuit

Published:2011/4/1 22:27:00 Author:may | Keyword: 2.2~6V, output 7V, voltage booster

2.2~6V output 7V voltage booster circuit
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Three time base window circuit

Published:2011/3/31 22:37:00 Author:may | Keyword: time base window

Three time base window circuit
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. (View)

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3 integrated voltage stabilizer parallel expansion output current

Published:2011/3/31 21:24:00 Author:may | Keyword: integrated voltage stabilizer, parallel expansion

3 integrated voltage stabilizer parallel expansion output current
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1024 bit CCPD support drive circuit

Published:2011/4/2 1:03:00 Author:may | Keyword: 1024 bit, support drive

1024 bit CCPD support drive circuit
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) (View)

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1,024 bits CCD drive circuit

Published:2011/3/21 0:38:00 Author:muriel | Keyword: 1,024 bits, CCD drive circuit

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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12 or 24h clock circuit

Published:2011/4/2 1:40:00 Author:may | Keyword: 12 or 24h, clock

12 or 24h clock circuit
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. (View)