Speech synthesizer

A speech synthesizer, comprising:

• an input terminal at which a phrase signal corresponding to a phrase is inputted and silence length data for setting a period of silence is inputted;
• a data memory having a plurality of address areas, which stores a plurality of phrases in the address areas;
• a counter receiving the phrase signal and the silence length data, the counter designating one of the address areas when the phrase signal is received, and setting for the period of silence when silence length data is received;
• a speech synthesizing circuit generating a speech synthesizing signal corresponding to the phrase stored in the designated area;
• a digital/analog converter transforming the speech synthesizing signal to an analog signal;
• and
• silence-input means being connected between the speech synthesizing circuit and the digital/analog converter, and supplying a predetermined voltage to the digital/analog converter for the period that is set by the counter.

A speech synthesizer having an output which outputs a result of the speech synthesizer, comprising:

• an input terminal at which a phrase signal corresponding to a phrase is inputted and silence length data for setting a period of silence is inputted;
• a data memory having a plurality of address areas, which stores a plurality of phrases in the address areas;
• a counter receiving the phrase signal and the silence length data, the counter designating one of the address areas when the phrase signal is received, and setting for the period of silence when silence length data is received;
• a speech synthesizing circuit generating a speech synthesizing signal corresponding to the phrase stored in the designated area;
• a digital/analog converter transforming the speech synthesizing signal to an analog signal;
• a filer circuit including a reference voltage generating circuit, which filters the analog signal outputted from the digital/analog converter, the reference voltage generating circuit generating a reference voltage;
• and
• silence-input means being connected between the filter and the output terminal, transferring the reference voltage to the output terminal for the period which is set by the counter, and transferring an output signal of the filter to the output terminal for another period other than the period set by the counter.