1KHz Sine wave Generator

1KHz Sine wave Generator Circuit

This ambit generates a acceptable 1KHz sinewave adopting the astern Wien arch agreement (C1-R3 & C2-R4). It appearance a capricious output, low baloney and low achievement impedance in adjustment to access acceptable afflict capability. A baby fiber ball ensures a abiding continued appellation achievement amplitude waveform.

Notes

• The bulb must be a low current type (12V 40-50mA or 6V 50mA) in order to obtain good long term stability and low distortion.
• Distortion @ 1V RMS output is 0.15% using a 12V 40mA bulb, raising to 0.5% with a 12V 100mA one.
• Using a bulb differing from specifications may require a change of R6 value to 220 or 150 Ohms to ensure proper circuit's oscillation.
• Set R5 to read 1V RMS on an Audio Millivoltmeter connected to the output with R7 rotated fully clockwise, or to view a sinewave of 2.828V Peak-to-Peak amplitude on the oscilloscope.
• With C1, C2 = 100nF the frequency generated is 100Hz and with C1, C2 = 1nF frequency is 10KHz but R5 requires adjustment.
• High gain transistors are preferred for better performance.