Peaking adjustment circuit

A peaking adjustment circuit comprising:

• an amplifier circuit including a first node to which a first input signal is input, a fifth node to which a second input signal is input, and a second node and a sixth node as output nodes;
• an adjustment circuit including a third node and a seventh node as output nodes, a first inductor connected between the second node and the third node, a first series circuit connected between the third node and a ground wiring and having a first capacitor and a first variable resistance element connected in series with each other, a second inductor connected between the sixth node and the seventh node, and a second series circuit connected between the seventh node and the ground wiring and having a second capacitor and a second variable resistance element connected in series with each other;
• and
• a follower circuit including a fourth node and an eighth node as output nodes, a first source follower circuit connected between the third node and the fourth node, and a second source follower circuit connected between the seventh node and the eighth node, wherein
• the first variable resistance element has a first resistance value that changes according to a first setting signal, and
• the second variable resistance element has a second resistance value that changes according to a second setting signal.

A peaking adjustment circuit comprising:

• an amplifier circuit including a first node to which a first input signal is input and a second node as an output node, and generating an amplified signal having peaking characteristics according to the first input signal in the output node;
• an adjustment circuit including a third node, and a first series circuit connected between the third node and a ground wiring and having a first capacitor and a first variable resistance element connected in series with each other;
• and
• a follower circuit including a fourth node as an output node, and a first source follower circuit connected between the third node and the fourth node,
• wherein the first variable resistance element has a first resistance value that changes according to a first setting signal.

A peaking adjustment circuit comprising:

• an amplifier circuit including a first node to which a first input signal is input, a fifth node to which a second input signal is input, and a second node and a sixth node as output nodes, and generating an amplified signal having peaking characteristics according to the first input signal and the second input signal in the output node;
• an adjustment circuit including a third node and a seventh node as output nodes, a first series circuit connected between the third node and a ground wiring and having a first capacitor and a first variable resistance element connected in series with each other, and a second series circuit connected between the seventh node and the ground wiring and having a second capacitor and a second variable resistance element connected in series with each other;
• and
• a follower circuit including a fourth node and an eighth node as output nodes, a first source follower circuit connected between the third node and the fourth node, and a second source follower circuit connected between the seventh node and the eighth node, wherein
• the first variable resistance element has a first resistance value that changes according to a first setting signal, and
• the second variable resistance element has a second resistance value that changes according to a second setting signal.