| 摘要 |
A comparator comprises m(m= 1,2...) transistors T1 to receive a first input signal (Vi) to the repective bases of the transistor (s) and n(n=1,2...) and n approx. equal to m transistors (T2) to receive a second input signal to the respective bases of the transistor(s). A first load resistor (R1) is connected in series with the first circuit and a second load resistor (R2) having the same resistance as the first resistor is connected in series with the second circuit. A differential amplifier (A) has input terminals connected to the junction of the first load resistor and the first circuit and the junction of the second load resistor and the second circuit. By selecting the numbers n and m (at the design stage) the threshold voltage of the circuit may be set.
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