Squarewave Filtering

Square wave testing can be used with operational amplifiers to ... | Filo

. The Bell System technical journal . f apparatus may be used for receiver testing with squarewaves. Square-wave generator circuits have been published both for audio^and video frequency use, involving vacuum tube circuits which overload atlow voltages. For low speeds using low-frequency waves of the order60 cps, a simple mercury switch operated by an oscillator gives very satis-factory results. The square-wave voltage is introduced across a small part of the resistancetermination as shown in Fi