The binary value of coded signals having opposite going transitions normally in the center of a bit cell, wherein the direction of the transition determines the binary value of the bit cell, is detected. The repetition rate of bit cells of a coded signal control the rate which a signal to be integrated is accumulated by an integrator. The integration duration is controlled by the length of the bit cell. The direction of integration is controlled by the direction of the center transition of each bit cell. In response to the amplitude of the accumulated signal at the end of the integration duration being greater or less than a reference amplitude, the binary value of the bit in the bit cell is determined. Integration is performed by first and second integrators respectively activated to accumulate the signal to be integrated during odd and even numbered bit cells. The first and second integrators are reset to zero during even and odd numbered bit cells, respectively. The accumulated signals of the first and second integrators are sensed prior to resetting thereof to indicate the binary values of the odd and even numbered bit cells.
A decoder for Manchester encoded data signals in which the encoded data signals are applied to a first circuit which produces a primary pulse at each voltage transition of the applied signals. The primary pulse enables a delay line oscillator which after a predetermined period of delay produces a decode clock signal of a given frequency. The inverted primary pulse, the decode clock signal, and a constant voltage data input signal are applied to a decoder shift register. The primary pulse and selected outputs of the decoder shift register are applied to a logic circuit which produces a receive clock signal having desired low-to-high voltage transitions occurring substantially in the center of each half-bit cell of a Manchester bit cell. The receive clock signal can be applied to a receive data shift register to which the encoded data signals are also applied so that the binary value of each half-bit cell of a Manchester bit cell can be stored in the data shift register.
The loading apparatus includes a rotary disk that is rotated by a pair of pedals, in order to generate a desired resistive load. A rotary shaft is connected to the rotary disk, and applied the resistive load to the bicycle wheel. A pair of eddy current generating members generate a user controlled, variable eddy current on the rotary disk. Each eddy current generating member includes one set of magnets, such that these magnets are generally oppositely disposed with respect to the rotary disk. Each set of magnets includes a plurality of magnets of alternating polarities, there are concentrically continuously arranged around the rotary shaft.
A biphase code detector and method for implementing the same. In accordance with one embodiment, the biphase code detector includes a receiver input for receiving a biphase encoded signal. The biphase encoded signal is a stream of unit bit cells each having a logic value encoded as a mid-bit transition between a first half-symbol signal component and a second half-symbol signal component. An integrated value is produced for the first and the second half-symbol components of a received unit bit cell. The biphase code detector further includes a delta detector that generates a difference signal corresponding to the difference between the integrated values of the first and second half-symbol components to determine the logic value of the received unit bit cell.
