| 摘要 |
A digital hyperbolic function generator comprises a frequency dividing circuit for frequency dividing first clock signals of a fixed frequency to produce second clock signals for each fixed time interval, a setting circuit for changing the setting thereof in correspondence to the number n of said second clock signals, said setting being produced in a binary code, a modulating circuit for frequency modulating said first clock signals with said setting to produce third clock signals the period of which is proportional to n 1 + n + SIGMA r, r = 1 AND A CONVERTER CIRCUIT FOR PRODUCING A VOLTAGE CORRESPONDING TO THE NUMBER OF SAID THIRD CLOCK SIGNALS. The digital hyperbolic function generator thus constructed generates a hyperbolic function of polygonal line approximation the gradient of which changes for each fixed time interval with a high accuracy, and the operation thereof is stabilized against the change in ambient temperature because the circuits are constructed by digital elements. |
