Self-enabling pulse trapping circuit
First Claim
Patent Images
1. An integrated memory device comprising:
- a control signal input for receiving a control signal;
an address latch input for receiving an address latch signal;
a signal trapping circuit coupled to the control signal input and the address latchinput and adapted to latch a transition in the control signal; and
filter circuitry to filter noise received on the control signal input.
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Abstract
An integrated circuit memory device is described which can operate at high data speeds. The memory device can either store or retrieve data from the memory in a burst access operation. The burst operations latches a memory address from external address lines and internally generates additional memory addresses. An external input is used to terminate and change a burst operation. Circuitry is provided to monitor the external input during burst operations and provide an appropriate control signal.
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Citations
17 Claims
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1. An integrated memory device comprising:
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a control signal input for receiving a control signal; an address latch input for receiving an address latch signal; a signal trapping circuit coupled to the control signal input and the address latch input and adapted to latch a transition in the control signal; and filter circuitry to filter noise received on the control signal input.
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2. An integrated memory device comprising:
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a control signal input for receiving a control signal; an address latch input for receiving an address latch signal; and a signal trapping circuit coupled to the control signal input and the address latch input and adapted to latch a transition in the control signal, wherein the signal trapping circuit comprises; a low transition latch circuit to latch a high to low transition in the control signal when the address latch signal is activated; and a high transition latch circuit to latch a low to high transition in the control signal when the address latch signal is activated. - View Dependent Claims (3, 4, 5, 6, 7)
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8. An integrated memory circuit comprising:
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a write enable input for receiving a write enable signal; an address latch input for receiving an address latch signal; and a signal trapping circuit coupled to the write enable input and the address latch input and adapted to latch a transition in the write enable signal, the signal trapping circuit comprising, a low transition latch circuit to latch a high to low transition in the write enable signal when the address latch input is activated, a high transition latch circuit to latch a low to high transition in the write enable signal when the address latch input is activated, and a pulse generator circuit coupled to the low transition latch circuit and the high transition latch circuit to generate a pulse in response to an output of the low transition latch circuit and the high transition latch circuit. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of latching a control signal in a memory circuit having a control signal input and an address latch input, the method comprising the steps of:
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receiving an address latch signal on the address latch input; receiving a control signal on the control signal input; enabling a first latch circuit on an active transition of the address latch signal if the control signal is in a first logic state, or enabling a second latch circuit on an active transition of the address latch signal if the control signal is in a second logic state; and latching a transition of the control signal. - View Dependent Claims (15, 16, 17)
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Specification