Power supply system to subscriber circuit

Abstract

Abstract PURPOSE:To obtain a power supply circuit where the termination impedance is constituted optionally and which has resistance to AC induction, by using two operational amplifiers of voltage follower connection. CONSTITUTION:The AC output impedance of the power supply circuit is expressed as R1B(1+ZB/R2B)+R1A(1+ZA/R2A), where R2B>>R1B and R2A>> R1A. Thus, when R2B=N.R1B and R2A=N.R1A, the AC output impedance is equal to the termination impedance Z, and it means that the AC output impedance is selected freely. In regulating the cut-off frequency of the circuitry comprising a capacitor CB, a resistor R3B and a capacitor CA and a resistor R3A to 50-200Hz taking the AC induction into account, since the rsistors R3A, R3B are large amount then the capacitors CA, CB can be of small value.

Inventors

• 👤 Toshiro Tojo
• 👤 敏郎 東條
• 👤 Mitsutoshi Ayano
• 👤 綾野　光俊
• 👤 Kiyoshi Shibuya
• 👤 清 渋谷
• 👤 Shinichi Ito
• 👤 真一 伊藤
• 👤 Yoshito Takeda
• 👤 竹田　義人

Bibliographic Details