Pulse-train-to-sinusoid-converter


Posted on Nov 10, 2012

The circuit letsyou convert a serial pulse stream or sinusoidal input to a sinusoidal output at 1/32 the frequency. By varying the frequency of Vrn, you can achieve an output range ofl07:1-from about 100 kH2 to less than 0.01 H2. The output resembles that of a 5-bit d/a converter operating on paralleLdigital data. Counter IC1 generates binary codes that repeatedly scan the range from 00000 to 11111. The output amplifier adds the corresponding XOR gate outputs, Vvv or ground, weighted by the values of input resistors R1 through R4.


Pulse-train-to-sinusoid-converter
Click here to download the full size of the above Circuit.

The 16 counter codes 00000 to 01111, for instance, pass unchanged to the XOR gate outputs, and cause Vom to step through the half-sinusoidal cycle for maximum amplitude to minimum amplitude. Counter output Q4 becomes high for the next 16 codes, causing the XOR gates to invert the QO through Q3 outputs. As a result, VouT steps through the remaining half cycle from minimum to maximum amplitude. The counter then rolls over and initiates the next cycle. You can change the R1 through R4 values to obtain other VouT waveforms. VDv should be at least 12 V to assure maximum-frequency operation from IC1 to IC2.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Sound Effects Generator
Mini Class A Audio Amplifier
Solenoid Driving Circuit
NIXIE I NIXIE clock using six ZM1030 tubes
Motion Sensor Light Circuit
Ethernet Hardware Schematics
Low voltage DC power charger circuit
Bidirectional thyristor AC contactor interface circuit



Top