Digital-to-analog converter

A programmable generator configured to generate a decreasing sawtooth signal, comprising:

• a programmable digital-to-analog converter comprising:
• an analog circuit configured to convert a binary word into a value of analog voltage;
• and
• a digital circuit configured to supply the binary word starting from a maximum value decremented by a decrement value.

A circuit, comprising:

• a digital-to-analog converter configured to generate a voltage ramp signal, the digital-to-analog converter configured to receive a reset signal that causes a voltage of the voltage ramp signal to reset and a decrement signal that causes the voltage of the voltage ramp signal to decrement;
• and
• a triggering circuit configured to generate the reset signal and the decrement signal, said triggering circuit comprising:
• a first register configured to store a reset period value;
• a counter configured to count and output a count value;
• a first comparator configured to assert the reset signal when the count value equals the reset period value, the reset signal further causing the counter to reset;
• a second register configured to store an accumulated value;
• a second comparator configured to assert the decrement signal when the count value equals the accumulated value;
• a third register configured to store an increment value;
• and
• a summation circuit configured to add the increment value to the accumulated value and store a summed value in the second register as the accumulated value in response to assertion of the decrement signal.