| 摘要 |
<p>PURPOSE:To improve switching characteristics of a memory read by lessening influences of fluctuations of temperature upon a DC noise margin, by matching the temperature characteristics of a comparator input signal with those of a reference signal. CONSTITUTION:Transistors (TR) 203 and 204 of a reference bias circuit applying a reference signal to a comparator 200 forming an output circuit are of the same size with switching TRs 10 and 11 forming an input circuit and controlled by a 1/6 decoder 8, and with switching TRs 17 and 18 which correspond to the 1/64 decoder; and a diode 205 is of the same size with diodes 19-22 of fuses forming a PROM, and a resistance 207 is of the same size with fuses 23-26. Therefore, temperature characteristics of an input signal to the comparator 200 become similar with those of a reference signal to lessen influences of fluctuations of temperature upon a DC noise margin, and consequently while an increase in amplitude is prevented, a time constant never increases, generating an output which corresponds to the memory contents of a memory based upon stable and fast switching operation.</p> |
