Input structure for charge coupled devices with controllable input bias

Abstract From the Canadian patent

In a charge-coupled device a DC bias on its, signal register input is automatically corrected for thermal fluctuations and other environmental effects. First and second reference registers are deposited on the same substrate as the signal register. The first register has the same input structure and control as the signal register and the same output end as the second reference register. The input channel width of the second register is selected such that the ratio of the input widths of the first and second reference registers matches the ratio of the dynamic range and desired bias level of the signal register. All three registers are clocked synchronously, but the input of the second …