Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Random access memory capable of varying a frequency in active and standby modes










Image Number 5 for United States Patent #4616346.

In a memory selectively operable in an active and a standby mode, a first oscillation signal of a first frequency is produced by an oscillator (35a or 35b) in the standby mode so as to reduce electric power consumption, instead of a second oscillation signal which is produced in the active mode and which has a second frequency higher than the first frequency. The first and the second oscillation signals are selectively supplied as a substrate voltage to a substrate (20) through a substrate voltage production circuit (36). The oscillator may comprise a first circuit portion (46 to 48) for oscillating the second oscillation signal and a capacitor circuit (51 to 53) connected to the first circuit portion through a second circuit portion (56 to 58) in the standby mode so as to generate the second oscillation signal. Alternatively, the oscillator comprises first and second oscillator sections (61 and 67) for generating the first and the second oscillation signals and a selecting circuit (70) for selecting the first and the second oscillation signals. The second oscillation circuit is kept inactive during generation of the first oscillation signal.








 
 
  Recently Added Patents
Image forming apparatus acquiring image processing time detected when the acquired time is longer that the previously set time and to correct output image density using generated patch pattern
Vibration disturbance estimation and control
Controller for internal combustion engine
High-order harmonic device of cavity filter
Method of producing probabilities of being a template shape
Nonvolatile semiconductor storage device having conductive and insulative charge storage films
NMR, instrumentation, and flow meter/controller continuously detecting MR signals, from continuously flowing sample material
  Randomly Featured Patents
Rotary granular material cutters
Truck bolster center bowl wear plate
Processor for forms with multi-format data
System and method for encoding high density geometric symbol set
Shellfish tool
Glow plug and spark plug, and manufacturing method therefor
Reconfigurable robot drive
Method for treating aqueous solutions with weakly acidic cation exchange resins
Pulse amplifier suitable for use in the semiconductor laser driving device
Grooved spherical bearing for vertical machines