Four-output-waveform-generator


Posted on Oct 6, 2012

Many applications require control signals that have phase shifts with reference to an input signal. Circuit accepts a sine, square, or triangular wave as an input reference signal and produces square-wave outputs with 0`, 90`, 180`, and 270` phase shifts with respect to the input. Figure 38-3B shows the input and output waveforms. The circuit contains two !Cs: an LM565 phase-locked loop and a 7474 dual-D positive edge-triggered flip-flop. R1 and C1 set the free-running frequency of the LM565`s VCO. You should adjust R1 so that the frequency is approximately four times that of the input reference signal.


Four-output-waveform-generator
Click here to download the full size of the above Circuit.

The LM565 responds to input signals greater than 10 mV pk-pk; 3 V pk-pk is the chip"s maximum allowable input level. Q1 matches the LM565"s output to the flip-flops" inputs. The flip-flops" outputs provide the TTL-compatible square-wave signals with 0", 90", 180", and 270" phase shift with reference to the input signal.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Voltage Reference LED indicator
LED Traffic Lights for Games
Cmos logic probe
Preamp Transmit-Receive Sequencer Circuit
Colpitts oscillator
Programmable Home Security Alarm System
East Shi IDS-2000F STB switching power supply circuit



Top