Single power supply signal generator circuit diagram

How the signal generator works

A signal generator is a device that provides electrical signals of various frequencies, waveforms and output levels. It is used as a signal source or excitation source for testing when measuring the amplitude characteristics, frequency characteristics, transmission characteristics and other electrical parameters of various telecommunications systems or telecommunications equipment, as well as when measuring the characteristics and parameters of components. Signal generators, also known as signal sources or oscillators, are widely used in production practice and technology fields. Various waveform curves can be represented by trigonometric equations. A circuit that can generate a variety of waveforms, such as triangle waves, sawtooth waves, rectangular waves (including square waves), and sine waves, is called a function signal generator.

The signal generator is used to generate sinusoidal signals (low frequency) with a frequency of 20Hz to 200kHz. In addition to voltage output, some also have power output. Therefore, it has a wide range of uses. It can be used to test or repair the frequency characteristics, gain, and passband of low-frequency amplifiers in various electronic instruments and equipment. It can also be used as an external modulation signal source for high-frequency signal generators. In addition, it can provide AC signal voltage when calibrating electronic voltmeters. Principle of low-frequency signal generator: The system includes the main oscillator stage, main oscillator output adjustment potentiometer, voltage amplifier, output attenuator, power amplifier, impedance converter (output transformer) and indicating voltmeter. Schematic diagram of the power supply adaptive square wave generator. The main oscillator stage generates a low-frequency sinusoidal oscillation signal, which is amplified by the voltage amplifier to meet the voltage output amplitude requirements. The voltage can be directly output through the output attenuator. Use the main oscillator output adjustment potentiometer to adjust the output voltage. the size of.

Single power supply signal (function) generator circuit diagram

The output waveform of this circuit can be either a square wave or a triangle wave. The function of the area on the left is the same as that of the hysteresis comparator circuit using positive feedback. The inverting input is biased halfway across the supply by resistors R4 and R5. The output is fed back to the non-inverting input of the first order to control the frequency. The amplitude of the square wave is the first-order output swing, which is 8V.