Abstract: In a method for converting input analog signals to time signals and the time signals thus obtained to digital values, an arbitrary value is preset in a scaler as an offset prior to effecting a conversion and counting and the conversion and counting is effected by the time signals. A value the same as the preset value is digitally added, after the conversion and counting, to a counter in a direction in that the preset value is cancelled. The differential non-linearity is actually improved by varying the preset value every conversion and counting.

Abstract: A phase that a scaler is operated by gated clock-pulses is made different from another phase that the scaler is operated by the gated clock-pulses at every conversion cycle. The phases in which the operation of the scaler interferes with the clock-pulses and gate circuits are varied at random so that the interfering action is dispersed and an averaging action is obtained.

Abstract: In an analog to digital converting circuit used in a pulse height analyzer or in a time to digital converting circuit used in a time analyzer, the first binary in a scaler for counting clock pulses is switched over to use the true state and the complementary state each of the reset circuit and the output circuit, alternately. By switching over the reset circuit and the output circuit, no substantial variation in counting the scaler is induced and any odd-even unbalance phenomena due to the binary constitution of the scaler is statistically equilibrated.