The functions and the operations of the phase correction circuit 4300, the delay circuit 4310, and the first and second fine tuning circuits 4320a and 4320b are similar to those of the phase correction circuit 1300, the delay circuit 1310, and the first and second fine tuning circuit 1320a and 1320b of FIG. 5B, and thus, additional description will be omitted to avoid redundancy.

The first fine tuning circuit 4320a may include the first terminal T1, the second terminal T2, and the third terminal T3. The second fine tuning circuit 4320b may include the fourth terminal T4, the fifth terminal T5, and the sixth terminal T6. A connection relationship of the first fine tuning circuit 4320a and the second fine tuning circuit 4320b is similar to that described with reference to FIG. 5B or 7, and thus, additional description will be omitted to avoid redundancy.

In an embodiment, the first fine tuning circuit 4320a may be implemented with a first variable gain amplifier VGAa. In this case, the first terminal T1 may correspond to an input terminal of the first variable gain amplifier VGAa. The second terminal T2 may correspond to a gain-control terminal of the first variable gain amplifier VGAa. The third terminal T3 may correspond to an output terminal of the first variable gain amplifier VGAa. The first variable gain amplifier VGAa may include the first amplifier parasitic capacitance CAa.