Patent ID: 11936436
Assignee: ROHDE & SCHWARZ GMBH & CO. KG
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An external frontend device, comprising:
an integrated synthesizer circuit;
a reference signal input configured to receive a low-frequency reference signal from an electronic device that is established separately in a housing separate from the external frontend device, wherein the reference signal input is configured to forward the received low-frequency reference signal to the integrated synthesizer circuit, and wherein the integrated synthesizer circuit is configured to generate a local oscillator (LO) signal based on the low-frequency reference signal;
a channel arrangement comprising a receiver channel or a transmitter channel or a receiver channel and a transmitter channel;
at least one mixer circuit associated with the receiver channel or with the transmitter channel or with both the receiver channel and the transmitter channel, wherein the at least one mixer circuit is configured to mix the LO signal with a radio frequency (RF) signal processed by the receiver channel or with an intermediate frequency (IF) signal processed by the transmitter channel or with both a radio frequency (RF) signal processed by the receiver channel and an intermediate frequency (IF) signal processed by the transmitter channel, thereby obtaining an IF output signal or an RF output signal or both an IF output signal and an RF output signal, respectively; and
an IF correction circuit including a comb-signal input, wherein the comb-signal input is configured to receive a comb-signal, wherein the IF correction circuit is configured to correct one or more of the IF signal or the IF output signal based on the received comb-signal, and wherein the IF correction circuit is established separately from the integrated synthesizer circuit.