Making an analog multiplier circuit is a bit more complicated than a basic standard amplitude modulator circuit such as Figure 15 that includes a DC bias voltage with an AC modulating signal for Vcont ...

Figure 4 MOSFET amplitude modulator. The circuit consists of an N-channel MOSFET, two resistors, and a Schottky diode. The modulation signal, v-sig(t), is connected to the drain terminal of the MOSFET ...

With the Er8 sample an inverting amplifier (IA) was built by using a field effect transistor OPAMP TL081 as shown in Figure 1. In such a circuit, if the I bias is negligible compared with the currents ...