audio oscillator वाक्य

He had the vision of encouraging people at Stanford to start companies and stay in the area, and he helped get them government contracts and research grants . ( Terman persuaded two of his top graduate students, Bill Hewlett and William Packard, to stay in Palo Alto and commercialize the audio oscillator they developed at Stanford .)
Of the many projects they worked on, their very first financially successful product was a precision audio oscillator, the Model HP200A . Their innovation was the use of a small incandescent light bulb ( known as a " pilot light " ) as a temperature dependent resistor in a critical portion of the circuit, the negative feedback loop which stabilized the amplitude of the output sinusoidal waveform.