HMC137

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An HMC137 RF modulator uses a single diode to modulate the amplitude of an RF signal. It is a linear-in-frequency and linear-in-amplitude modulation device that features a low voltage, low power, and small-footprint. The device is designed for frequency hopping applications such as those found in consumer audio and video systems.

The HMC137 is composed of a series of components connected in a specific way that allow the RF modulator to modulate the amplitude of an RF signal. At the heart of the circuit is a single diode. This diode is the main element responsible for the linear-in-frequency and linear-in-amplitude modulation characteristics.A Metal Oxide Semiconductor Field-Effect Transistor (MOSFET) is connected to the diode to create a variable capacitance. The MOSFET is also connected to an adjustment port which is used to adjust the capacitance of the MOSFET. This adjustment port is used to control the frequency range of the RF modulator.

In operation, the RF signal is applied to the anode of the diode and the MOSFET is biased with a voltage which is determined by the adjustment port. The MOSFET then varies the capacitance of the diode which in turn affects the amplitude of the RF signal. This creates an amplitude modulated signal which can be used for various frequency hopping applications.

The HMC137 RF modulator also features various other features such as a noise figure of -25 dB, a harmonic distortion of less than -60dBc, wide input dynamic range (up to +27 dBm/-20 dBm), and wide output dynamic range (up to +17 dBm/-17 dBm). These features make the HMC137 an ideal choice for consumer audio and video systems that require frequency hopping.

The HMC137 is also designed to operate within a wide temperature range and is suitable for use in a variety of industries. It is widely used in automotive, medical, aerospace, and military applications. In addition, the HMC137 is compliant with various emission standards such as CENELEC Class B, FCC Part 15, and VDE 0871.

The HMC137 is an ideal solution for applications that require an RF modulator that is linear-in-frequency and linear-in-amplitude modulation. It features a low voltage, low power, and small-footprint design which is ideal for consumer audio and video systems. Additionally, it is highly suitable for use in applications that require frequency hopping and is compliant with various emission standards.

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