Sawtooth voltage generator. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Sawtooth voltage generator. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Radio amateur designer

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The generator, the schematic diagram of which is shown in the figure, allows you to get a sawtooth voltage of a sufficiently high linearity. It is made on two operational amplifiers and one field-effect transistor with an insulated gate.

Sawtooth voltage generator

On the first operational amplifier MS1, a generator of rectangular pulses is assembled, the repetition rate of which is synchronized by the input pulses. The duration of the pulse and pause is determined by the time of charge and discharge of the capacitor C1.

The capacitor is charged through resistors R1 and R2, and discharged only through resistor R1 (resistor R2 is shunted by diode D1). Diode D2 and Zener diode DZ limit the positive voltage applied to the input of the field effect transistor T1.

On the second operational amplifier MS2, an integrator is made, the operation of which is controlled by pulses coming from a rectangular pulse generator through an electronic key (transistor T1).

Note. In the sawtooth voltage generator, you can use the K153UD1A operational amplifiers and the KP301 field effect transistor.

Literature

"Radio, television, electronics" (NRB), 1975 No. 2

Publication: N. Bolshakov, rf.atnn.ru

See other articles Section Radio amateur designer.

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