Dynamic semiconductor storage

Abstract

Abstract PURPOSE:To reduce power consumption by providing an oscillating means to output a prescribed frequency signal to two means out of a voltage holding means, a substrate bias voltage generating means and a timer means and to give the output signal as a prescribed frequency input signal. CONSTITUTION:To a ring oscillator 2, a voltage holding circuit 21, a substrate bias voltage generating circuit 1 and a timer circuit 3 are connected and a switch circuit 6 to be opened and closed by a control circuit 5 and inverters I1 and I2 are serially connected and interposed between the oscillator 2 and a capacitor C. For example, when a substrate potential goes to be higher than a prescribed level, the switch circuit 6 goes to a conductive condition and the output side of the oscillator 2 and the input side of the inverter I1 are electrically connected. Then, the operation of the substrate bias voltage generating circuit 1 is restarted. Accordingly, by executing the turning-on and off of this switch circuit 6, oscillation is inputted from the oscillator 2 only when it is needed. Thus, power consumption can be reduced.

Inventors

• 👤 Hiroyuki Yamazaki
• 👤 山崎　宏之

Bibliographic Details