Is this good for educators?

Yes — this version of "BJT Amplifier for a crystal oscillator" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.

Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Educators · BJT Amplifier

BJT Amplifier for a crystal oscillator

Built for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs. Simulate a crystal oscillator live below — adjust the inputs and watch it respond, right in your browser.

BJT Common-Emitter AmplifierLive

bias point & gain

Controls

Presets

Supply Vcc (V)

Collector Rc (kΩ)

Emitter Re (kΩ)

Base current (µA)

Current gain β

A transistor amplifies because a tiny base current controls a much larger collector current (Ic = β·Ib). The Q-point on the DC load line sets how much undistorted swing you get; too far and the transistor saturates or cuts off. Educational tool.

▶ Run in Python

Data Inspector

Collector current3.00 mA

V_CE (bias)3.99 V

Voltage gain-4.7 ×

Regionactive ✓

Governing equation

V_{C E} = V_{C C} - I_{C} (R_{C} + R_{E}) = 12 - 3.00 (2.2 + 0.47) = 3.99 V

Reading this result: Sitting in the active region with about 4.0 V of V_CE headroom; the gain ≈ -Rc/Re ≈ -4.7×, so shrinking Re trades bias stability for more voltage gain.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

Also for:Students Researchers Engineers Hobbyists & Makers K-12 Students First Responders General version →

More with BJT Amplifier

BJT Amplifier for an RLC circuit BJT Amplifier for a power supply BJT Amplifier for a transformer BJT Amplifier for a DC motor BJT Amplifier for an op-amp filter BJT Amplifier for an antenna BJT Amplifier for a transmission line BJT Amplifier for a PCB trace

Frequently asked questions

Is this good for educators?: Yes — this version of "BJT Amplifier for a crystal oscillator" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.