Variably controlled delay line for read data capture timing window

An apparatus comprising:

• a select circuit configured to receive a control code indicating a circuit delay for offsetting at least a portion of a transmission delay of a strobe signal;
• a delay circuit configured to receive the strobe signal and to delay the strobe signal such that transitions of the delayed strobe signal occur within a timing window for storing valid data in a memory circuit responsive to the delayed strobe signal;
• and
• wherein the delay circuit comprises a first stage circuit, the first stage circuit comprising:
• a first input;
• a first output;
• a first conductive node coupled between the first input and the first output;
• a first capacitor coupled to a ground node;
• a first transmission gate coupled to the first capacitor and the first conductive node and responsive to a first bit of the control code.

A method comprising:

• selecting a circuit delay according to a control code, the circuit delay for offsetting at least a portion of a transmission delay associated with a strobe signal;
• delaying the strobe signal by the circuit delay, wherein the delayed strobe signal comprises transitions occurring within a timing window for storing valid data in a memory circuit responsive to the delayed strobe signal;
• and
• wherein the delaying further comprises:
• providing a first signal to inputs of a first pair of transmission delay circuits;
• transmitting the first signal to respective outputs of the first pair of transmission delay circuits with distinct time delays;
• and
• wherein the selecting further comprises:
• providing the distinct time delayed first signals to respective inputs of a first multiplexer;
• providing a first bit of the control code to a first control input of the first multiplexer;
• and
• multiplexing, using the first multiplexer, one of the distinct time delayed first signals to an output thereof according to the first bit of the control code.

An apparatus comprising:

• a plurality of controllable delay circuits coupled in series, the plurality of controllable delay circuits being responsive to a control code and responsive to a strobe signal to generate a delayed strobe signal,
• wherein the control code is based at least in part on a portion of a transmission delay of the strobe signal;
• wherein the control code is based at least in part on a target relationship between the delayed strobe signal and at least one data signal to be stored in a memory circuit responsive to the delayed strobe signal;
• wherein individual ones of the plurality of controllable delay circuits comprise:
• a delay circuit configured to receive a version of the strobe signal and to delay the version of the strobe signal to generate a delayed version of the strobe signal;
• and
• a select circuit coupled to the delay circuit and responsive to at least a portion of the control code to select a delay associated with the delayed version of the strobe signal.