公开(公告)号：US3842371A

公开(公告)日：1974-10-15

申请号：US40581173

申请日：1973-10-12

Applicant: HONEYWELL INC

Inventor： KELLEY T

IPC: H03K3/0231 ,  H03K7/06 ,  H03M1/00 ,  H03K3/02

CPC classification number: H03K7/06 ,  H03K3/0231 ,  H03M1/60

Abstract: A voltage to frequency converter includes an integrating ramp generator the output of which is compared with a reference signal to produce an output pulse whenever the magnitude of the ramp signal reaches equality with the reference signal. The output signal is coupled back through a switching circuit to reset the integrating ramp generator each time an output pulse is produced. The slope of the ramp being a function of the magnitude of the input signal applied to the ramp generator, the frequency of the output pulses will be proportional to the magnitude of the applied input signal. In order to accomplish a relatively high frequency of output pulses without unduly increasing the frequency of the switching operation, a plurality of comparators are provided, each connected directly to the output of the ramp generator and each comparing the ramp signal with a different reference signal level. A pulse signal generator is connected to the output of each of the comparators to produce a pulse whenever the associated comparator recognizes an equality between the ramp signal and its unique reference signal. The output of the several pulse generators are coupled through an OR gate to an output circuit. The output pulse from the pulse generator coupled to the comparator to which the highest reference signal is applied is the only one coupled back to operate the switching circuit to reset the ramp generator.

Abstract translation: 电压 - 频率转换器包括积分斜坡发生器，其输出与参考信号进行比较，以便每当斜坡信号的幅度与参考信号相等时产生输出脉冲。 每当产生输出脉冲时，输出信号通过开关电路耦合回复积分斜坡发生器。 斜坡的斜率是施加到斜坡发生器的输入信号的大小的函数，输出脉冲的频率将与施加的输入信号的幅度成比例。 为了实现相对高频率的输出脉冲而不会不适当地增加开关操作的频率，提供了多个比较器，每个比较器直接连接到斜坡发生器的输出，并且每个比较斜坡信号与不同的参考信号电平 。 只要相关联的比较器识别出斜坡信号与其唯一的参考信号之间的相等，脉冲信号发生器连接到每个比较器的输出端，以产生脉冲。 多个脉冲发生器的输出通过或门耦合到输出电路。 耦合到施加了最高参考信号的比较器的脉冲发生器的输出脉冲是仅耦合回来的操作开关电路以复位斜坡发生器的输出脉冲。