A data communications receiver (102, 302, 303, 502, 503) comprising: a receiver coil; a first amplification stage (110, 310, 510) coupled to the receiver coil, the first amplification circuitry to amplify a difference between a) at least part of a signal (116, 316, 516) received by the receiver coil and b) a threshold (336, 536); a current amplification circuit (112, 312, 512) having an input coupled to receive the amplified difference (318, 518) from the first amplification stage, wherein the current amplification circuit comprises a first MOSFET (328, 528) having a control terminal, a first of the source/drain coupled to the input of the current amplification circuit, and a second of the source/drain coupled to a first reference potential, and a second MOSFET (329, 529) having a control terminal coupled to the input of the current amplification circuit, a first of the source/drain coupled to the output of the current amplification circuit, and a second of the source/drain coupled to a second reference potential, wherein, in operation, the control terminal of the first MOSFET is biased so that the first MOSFET remains in a conductive state; and hysteretic level shifting circuitry (114, 314, 514) to shift a level of a) part of the filtered signal received by the receiver coil, b) the threshold, or c) both part of the filtered signal and the threshold such that, in response to the at least part of the signal received by the receiver coil having crossed the threshold, a threshold crossing in the other direction is delayed. a receiver coil; a first amplification stage (110, 310, 510) coupled to the receiver coil, the first amplification circuitry to amplify a difference between a) at least part of a signal (116, 316, 516) received by the receiver coil and b) a threshold (336, 536); a) at least part of a signal (116, 316, 516) received by the receiver coil and b) a threshold (336, 536); a current amplification circuit (112, 312, 512) having an input coupled to receive the amplified difference (318, 518) from the first amplification stage, wherein the current amplification circuit comprises a first MOSFET (328, 528) having a control terminal, a first of the source/drain coupled to the input of the current amplification circuit, and a second of the source/drain coupled to a first reference potential, and a second MOSFET (329, 529) having a control terminal coupled to the input of the current amplification circuit, a first of the source/drain coupled to the output of the current amplification circuit, and a second of the source/drain coupled to a second reference potential, wherein, in operation, the control terminal of the first MOSFET is biased so that the first MOSFET remains in a conductive state; and a first MOSFET (328, 528) having a control terminal, a first of the source/drain coupled to the input of the current amplification circuit, and a second of the source/drain coupled to a first reference potential, and a control terminal, a first of the source/drain coupled to the input of the current amplification circuit, and a second of the source/drain coupled to a first reference potential, and a second MOSFET (329, 529) having a control terminal coupled to the input of the current amplification circuit, a first of the source/drain coupled to the output of the current amplification circuit, and a second of the source/drain coupled to a second reference potential, a control terminal coupled to the input of the current amplification circuit, a first of the source/drain coupled to the output of the current amplification circuit, and a second of the source/drain coupled to a second reference potential, hysteretic level shifting circuitry (114, 314, 514) to shift a level of a) part of the filtered signal received by the receiver coil, b) the threshold, or c) both part of the filtered signal and the threshold such that, in response to the at least part of the signal received by the receiver coil having crossed the threshold, a threshold crossing in the other direction is delayed. a) part of the filtered signal received by the receiver coil, b) the threshold, or c) both part of the filtered signal and the threshold