Charge coupled devices with simplified drive requirements

The capabilities of charge coupled devices make them attractive for a wide range of signal processing applications. However, their advantages are diminished if they need to be surrounded by a significant amount of support circuitry. To what extent this peripheral circuitry can be simplified if not eliminated is discussed. Two delay line designs are discussed in detail. In an audio delay line all the support circuitry can be integrated onto the CCD chip. Power considerations prevent this being done at video frequencies. However, it is possible to reduce the video delay line drive requirements to a single phase clock drive - all other required waveforms, etc. being generated on chip.