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US3859637A Expired / Lapsed US ⏱️ 0.0 years remaining

On-chip auxiliary latch for down-powering array latch decoders

Assignee: International Business Machines Corp
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Filing: 1973-06-28
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Granted: 1975-01-07
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Expires: 1993-06-28
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Abstract

Abstract A monolithic semiconductor array of bi-level powered memory cells is provided with a number of on-chip row and column primary latching circuits. The primary latching circuits allow for the down-powering of the on-chip row and column address decoders after a particular chip and a particular storage cell on the chip have been selected by a respective address signal and a set signal. An auxiliary latching circuit, substantially identical to each of the aforesaid primary latching circuits, also is provided on-chip and receives the same set signal as does each primary latching circuit. The primary latching circuits and the auxiliary latching circuit are ''''set'''' substantially simultaneously by the set signal. The setting of the auxiliary latching circuit initiates a signal which downpowers each of the on-chip address decoders. Means are also provided on-chip for resetting each of the selected primary and the auxiliary latching circuits upon the termination of the chip select signal.

Inventors

  • 👤 Steven Platt
  • 👤 Jehoshua N Pomeranz
  • 👤 Dinesh K Tewarson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 15:01
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/41; G11C11/413; G11C11/417; G11C11/418; G11C11/414; G11C11/415; G11C5/00; G11C8/00; G11C8/18; H; H03; H03M; H03M7/00

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 123 words
In an array of electronic devices having primary latching circuits, each primary latching circuit being connected to respective devices for up-powering said devices when set to a first condition and for down-powering said devices when reset, said first condition being fulfilled by the concurrence of an address signal from powered addressing circuits and a set signal, means for down-powering said powered addressing circuits following the fulfillment of said first condition comprising; an auxiliary latching circuit, first means for applying said set signal jointly to said primary and to said auxiliary latching circuits, said auxiliary latching circuit producing a set complete signal when set, and second means for applying said set complete signal to said powered addressing circuits for down-powering said powered addressing circuits.
Claim 2
Dependent Claim 123 words
In an array of electronic devices having primary latching circuits, each primary latching circuit being connected to respective devices for up-powering said devices when set to a first condition and for down-powering said devices when reset, said first condition being fulfilled by the concurrence of an address signal from powered addressing circuits and a set signal, means for down-powering said powered addressing circuits following the fulfillment of said first condition comprising; an auxiliary latching circuit, first means for applying said set signal jointly to said primary and to said auxiliary latching circuits, said auxiliary latching circuit producing a set complete signal when set, and second means for applying said set complete signal to said powered addressing circuits for down-powering said powered addressing circuits.
Claim 3
Dependent Claim 28 words
The apparatus defined in claim 1 wherein said electronic devices are memory cells and said auxiliary latching circuit is substantially identical to each of said primary latching circuits.
Claim 4
Dependent Claim 76 words
The apparatus defined in claim 2 wherein said second means for applying comprises a powered gate driver responsive to a select signal and to said set complete signal, said powEr gate driver producing a power gate signal in response to said select signal, said power gate driver terminating said power gate signal in response to said set complete signal, said power gate signal being applied to said powered addressing circuits for up-powering said powered addressing circuits.
Claim 5
Dependent Claim 28 words
The apparatus defined in claim 3 wherein said powered addressing circuits comprise a true-complement generator and an address decoder, said power gate signal being applied to said generator.
Claim 6
Dependent Claim 37 words
Apparatus as defined in claim 4 wherein said array of memory cells, primary latching circuits, auxiliary latching circuit, powered addressing circuits, and said means for down-powering said powered addressing circuits are on the same monolithic semiconductor substrate.

References Cited (Backward Citations)

US2825821A Cited
US3764833A Cited
US3736569A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-01-06 1978-07-08 1979-01-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-01-06 1982-07-08 1983-01-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-01-06 1986-07-08 1987-01-07 $7700.00 Window Closed / Lapsed

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