US 11,081,160 B2 · Apparatus and methods for triggering row hammer address sampling

Abstract

Apparatuses and methods for triggering row hammer address sampling are described. An example apparatus includes an oscillator circuit configured to provide a clock signal, and a filter circuit. The filter circuit includes a control circuit configured to receive pulses of the clock signal and provide an output signal that represents a count number by counting a number of pulses of the clock signal and control a probability of enabling the output signal based on the count number. The filter circuit further includes a logic gate configured to pass one of the pulses of the clock signal responsive to the output signal from the control circuit being enabled and filter another of the pulses responsive to the output signal from the control circuit being not enabled.

Claims20

Dependent claims

An apparatus comprising:

a row hammer control circuit configured to provide a row hammer control signal that indicates a start of a row hammer interval;
a sampling timing generator circuit configured to provide pulses on an trigger sample signal to trigger time-based samples of row addresses in response to the row hammer control signal, wherein the sampling timing generator circuit comprises a filter circuit that is configured to adjust a probability of providing the pulses on the trigger sample signal based on count of previous pulses of the trigger sample signal within the row hammer interval;
and
a time-based sampling circuit configured to initiate a respective sample of a row address in response to each of the pulses of the trigger sample signal, wherein a probability of capturing a valid row address is constant for each of the pulses of the trigger sample signal.

1 more element

Dependencies are inferred from the claim text.

Apparatus and methods for triggering row hammer address sampling

Life of this patent

Apparatus and methods for triggering row hammer address sampling

Life of this patent

Abstract

Claims20