Waveform processing circuit

Abstract

Abstract PURPOSE:To suppress a large transient phenomenon even if a large pulse signal is inputted by forming a holding means for holding a normal signal level during the period that a pulse having a level higher than the normal signal level is applied. CONSTITUTION:An input signal V1 to a header part is obtained by adding a high frequency component vD-vO to a low frequency component vO. On the other hand, the input signal to a data part is a pulse signal vP with a high level in a recording mode. Receiving the input signal V1, a sample holding circuit 4 holds the component vO immediately before the data part until the end of the data part based on a hold timing signal S1. A signal V1 is obtained from said holding signal through a low-pass filter 5. A switching circuit 3 replaces the signal VI by the signal V1 based on a switch timing signal S2 and output a signal V2. Namely, the input signal is VI at the heater part and V1 at the data part in a recording time, so that a high level pulse vP can be removed. Therefore, no transient response is generated even if the signal V2 is passed through a high-pass filter.

Inventors

• 👤 Hiroshi Fuji
• 👤 寛 藤
• 👤 Takashi Iwaki
• 👤 貴志 巌城
• 👤 Tsuneo Fujiwara
• 👤 恒夫 藤原
• 👤 Toshihisa Deguchi
• 👤 出口　敏久
• 👤 Shozo Kobayashi
• 👤 省三 小林

Bibliographic Details