Patent
Signature circuit responsive to an input signal
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TLDR
In this article, a load is selectively coupled to the output terminal in response to an input signal of the integrated circuit if a particular node is programmed to a first logic state, and no load variation indicates another condition.Abstract:
An integrated circuit has a signature circuit which provides information concerning the integrated circuit itself. This information can, for example, specify that redundancy has or has not been implemented. Other potential information can relate to the particular mask set, the speed of the integrated circuit, and/or the manufacturer. The information is provided on a normal output terminal of the integrated circuit. A load is selectively coupled to the output terminal in response to an input signal of the integrated circuit if a particular node is programmed to a first logic state. If the particular node is programmed to a second logic state, the load is not responsive to the input signal. A load variation then indicates one condition of the integrated circuit, and no load variation indicates another condition. Numerous outputs can be similarly used to provide additional amounts of information according to some selected code.read more
Citations
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References
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Patent
Programmable fuse circuit
TL;DR: A programmable fuse circuit as mentioned in this paper has a fusable polysilicon element programmable in response to an illegal condition on existing pins of an integrated circuit and is incorporated in a programmable partial memory circuit, a reconfigurable format memory circuit and a chip select circuit.
Patent
Zero power CMOS redundancy circuit
TL;DR: In this article, a redundancy circuit that consumes no power before or after activation switches a pair of output nodes from a first set of complementary logic levels to an inverted set when it is activated.
Patent
Identification of repaired integrated circuits
TL;DR: In this paper, a circuit for providing an identification signal indicating whether or not an integrated circuit has been repaired includes a circuit which operates at potentials outside the normal range of the integrated circuit.
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IC with built-in electrical quality control flag
TL;DR: In this paper, an integrated semiconductor circuit device is provided with a special purpose readable indicator without providing additional pins, which can be utilized to store information pertinent to the operativeness of the integrated circuit.
Patent
Identity circuit for an integrated circuit using a fuse and transistor enabled by a power-on reset signal
TL;DR: In this article, an identifying circuit coupled to an input has a fuse which is in one of two possible states to provide the identifying information, such that a user is provided with identifying information by the presence or absence of a current path at the input at the time when power is applied.