Apparatuses and methods for temperature independent oscillators

An apparatus, comprising:

• a refresh timing circuit configured to provide refresh commands based on a number of periods of an oscillator signal;
• and
• an oscillator circuit comprising:
• a flip-flop configured to provide the oscillator signal;
• and
• a pulse generator circuit coupled to the flip-flop, the pulse generator circuit comprising:
• first and second transistors;
• a series-coupled resistor and diode;
• and
• a comparator having a first input coupled to the first and second transistors, a second input coupled to the series-coupled resistor and diode, and an output coupled to the flip-flop, wherein the first transistor is further coupled to a first node, and the first transistor includes a Gate coupled to an output of the comparator.

An apparatus, comprising:

• a refresh timing circuit configured to provide refresh commands based on a number of periods of an oscillator signal;
• and
• an oscillator circuit comprising:
• a pulse generator circuit configured to provide a periodic pulse signal, the pulse generator circuit comprising:
• a comparator having first and second inputs coupled to first and second nodes, respectively;
• first and second transistors coupled to the first input, wherein the first transistor comprises a gate coupled to an output of the comparator;
• and
• a series-coupled resistor and diode,
• wherein the series-coupled resistor and diode is coupled to the second node.