Linear Technology LT5579 Upconverting Mixer Application Note

About this manual

The application note presents a circuit design to achieve fast on/off switching of the transmitter supply voltage, which is beneficial for TDD applications requiring rapid Tx on/off times. The proposed solution uses a P-channel MOSFET and an N-channel FET to control the power supply to the LT5579 mixer.

What's inside

• Fast Time Division Duplex Transmission
• Upconverting Mixer with High Side Switch
• High Side Vcc Switch Circuit
• PCB Layout Considerations
• Vcc Turn-on and Turn-off Waveforms

Frequently asked questions

What is the maximum output frequency for the LT5579 mixer?

The LT5579 fits various transmitter applications with output frequencies up to 3.8GHz.

What is the leakage to the RF output when the mixer is off?

Leakage to the RF output of the LT5579 was measured at -46dBm for Vcc off.