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555 linear sawtooth wave generator circuit

2015-02-06 05:06  
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555 linear sawtooth wave generator circuit
The circuit shown in Figure 5-5 is a sawtooth-wave circuit composed of the monostable trigger circuit, cross-flow circuit. VT1 and D1, D2, Rt form constant current charging circuit to make a good ramp linearity. The charging time constant of 555 monostable circuit is mainly decided by R2, C2. The circuit can produce linearity sawtooth in several HZ to 50kHz frequency range of broadband. This circuit can be used in a variable time base circuit, current - frequency converter and audio synthesizers and other occasions.