BJT Phase Shift Oscillator 12V VCC R3 R4 RC R1 W w w 02 C8 R5 C5 HE 0.01F 2N2222A C7 HE 0.01MF 0.019F Q1 2N2222A R7 W Si
Posted: Mon May 02, 2022 2:41 pm
- Bjt Phase Shift Oscillator 12v Vcc R3 R4 Rc R1 W W W 02 C8 R5 C5 He 0 01f 2n2222a C7 He 0 01mf 0 019f Q1 2n2222a R7 W Si 1 (22.27 KiB) Viewed 49 times
4.- Procedure: 4.1. Study the attached schematic. • Capacitor values are given and are included in the kit provided. • Assume that the BJTs have a beta of 100. 4.2. Design the network with a Q1 ic of 2 mA, and a VCE of 5 volts. Show all equations in your final report. Choose 5% values and show them in your final schematic and parts list. 4.3. Measure and record the voltages of Qi's base, emitter and collector. Compare them to the calculated values. (Note: You may want to adjust R1 to get a better sine wave). 4.4. Calculate the output impedance of the network of Q2. Without R7, measure the output impedance of Q2 and compare it to the calculated value. Connect the speaker to the output. 4.5. Measure and record the voltages of Q2's base, emitter and collector. Compare them to the calculated values. 4.6. Chose frequency selective resistors R3 and R4 to give (as close as possible) an output frequency of 1 kHz. (see research section). 5.- Research: