Bridged T-coil

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Bridged T coil in 454 circuit. L337 and C337 constitute a bridged T coil. L336 is just a tapped T coil.

The (bridged) T-coil is a circuit topology that extends signal bandwidth.

A bridged T coil is a circuit configuration with a capacitor from input to resistive load and extends signal bandwidth (as does an unbridged T coil). The bridged T coil can also turn a complex load impedance such as an RC or a series RLC into a purely resistive load at all frequencies. A regular (not bridged by a capacitor) T coil cannot do the latter.