Ring Oscillator-2

In this section, I will show you the topology of ring oscillator based on OTA. Figure 1 is the topology of OTA. This OTA has two inputs and outputs which delay 180 degree.

Figure. 1 Topology of OTA

Figure 2 is the AC response of OTA. In this simulation, this OTA can be seen as a amplifier and also has high transfer speedn. 

Figure .2 AC response of OTA

Figure 3 is the topology of Ring oscillator. It only combine two OTA. Moreover, it can output two opposite signal in the same time. 

Figure 3. Ring oscillator based on OTA

Figure 4 is the simulation of Ring oscillator, and its frequency is 3 G Hz. 

Figure 4. Simulation of Ring oscillator