Triangular wave generator using opamp. Circuit diagram working and theory
Simple sawtooth generator operates at high frequency - EDN
Output of sawtooth generator circuit always 0V in LTSpice - Electrical Engineering Stack Exchange
LTspice Tutorials: Triangular Waveform in SPICE - YouTube
OTA- and CFOA-based Duty-cycle Tunable Square/Triangular Wave Generator with Independently Controllable Frequency and Amplitude - Journal of Applied Science and Engineering