MTT-17 Presents: An Analytical Approach for Designing Efficient Microwave Oscillators

For large-signal operation of oscillators, it is typically necessary to obtain the large signal device parameters of the active two-port network and calculate the external feedback elements for the circuit [1]–[16]. Figure 1 shows the simplified circuit diagram for a series feedback oscillator comprising the intrinsic transistor, its package parasitics, and the external feedback circuit. Both series and parallel feedback arrangements are common in oscillator circuits [9]. The circuit example shown below is based on the series feedback circuit and accounts for all intrinsic parasitic parameters [7]–[9].