Question

what type of amplifier configuration is the amplifier shown

Explanation:

1. Input and Output Nodes: The input signal \(V_{in}\) is applied to the base (or gate, but Q1 looks like a BJT) via \(C1\), and the output is taken from the collector (drain) via \(C2\). The emitter (source) is the common terminal (connected to ground through the network with \(R9\), \(C3\) etc., which is the AC ground for the emitter due to \(C3\) bypassing \(R9\) for AC signals).
2. Configuration Identification: In a common - emitter (for BJT) or common - source (for FET) amplifier, the input is applied to the base (gate) and output is taken from the collector (drain), with the emitter (source) being the common terminal between input and output. The biasing network (\(R10\), \(R9\), \(R11\), \(R12\)) and coupling capacitors (\(C1\), \(C2\)) along with the bypass capacitor (\(C3\)) support this configuration, where the emitter is at AC ground (so common to input and output circuits for AC signals).

Answer:

Common - Emitter (or CE) Amplifier (assuming the transistor is NPN/PNP in common - emitter configuration; alternatively, if it's a FET, maybe Common - Source, but given the transistor symbol Q1, more likely Common - Emitter)