DIGITAL RAMP GENERATOR
The following circuit is a ramp generator for those that need very slow rising rates. The tested output swing was 0 to +5Volts given the value of R1 and R6. The output was tested with an input clock of 100Hz, the output was about 2.5sec. The maximum output frequency atainable was approximately 24Khz with an input clk of 6MHz. Always use a negative voltage of greater than -8.5v, or the output swing cannot be possible.