| 摘要 |
A voltage to rate converter circuit for providing output digital pulses at a rate proportional to an analog input signal, including an input reference circuit for establishing an input reference signal of a first level; an integrated circuit for providing an output ramp signal proportional to the difference between the analog input signal and input reference signal of a first level and having a first slope direction which is the function of the polarity of that difference; a reference modifier circuit interconnected with the integrated circuit for shifting the input reference signal to a second level to reverse the slop direct tion of the output ramp signal to a second slope direction; a comparator reference circuit for alternately establishing a comparator reference signal of a first value and of a second value; a comparator circuit for providing an output pulse beginning in response to the output ramp signal in the first slope direction exceeding the comparator reference signal of a first value and ending in response to the output ramp signal in the second slope direction exceeding the comparator reference signal of the second value; and switching means responsive to the output pulse for enabling the comparator reference circuit to shift the comparator reference signal form the first value to the second value and for enabling the reference modifier circuit to shift the input reference signal from the first level to the second level. |
