1. A kinetic dumbbell, comprising:
a handle;
at least a first weight device connected to the handle, wherein the first weight device has at least an annular channel therein;
at least a rolling device received in the annular channel for free running;
wherein the handle is connected with two of the first weight devices at opposite ends thereof;
wherein a first angle is formed between an axis of the handle and a center axis of the annular channels of a first one of the first weight devices and a second angle is formed between the handle and a center axis of the annular channels of a second one of the first weight devices; and
wherein the first angle is unequal to the second angle.
2. The kinetic dumbbell as defined in claim 1, wherein the handle has a connecting portion at an end thereof, and the weight device has a kinetic member with the annular channel therein and a connecting portion to be engaged with the connecting portion of the handle.
3. The kinetic dumbbell as defined in claim 2, wherein the kinetic member has a first case and a second case, and the connecting portion is provided on the first case, and the annular channel is formed between the first case and the second case.
4. The kinetic dumbbell as defined in claim 1, further comprising a second weight device connected to the first weight device.
5. The kinetic dumbbell as defined in claim 4, wherein each of the weight devices has a post and a hole at opposite sides thereof for series connection.
6. A kinetic dumbbell, comprising:
a handle;
at least a weight device connected to the handle, wherein the weight device has at least an annular channel therein; and
at least a rolling device received in the annular channel for free running; and
further comprising at least a magnetic member mounted in a chamber of the weight device to attract the rolling device.
7. A kinetic dumbbell, comprising:
a handle;
at least a weight device connected to the handle, wherein the weight device has at least an annular channel therein; and
at least a rolling device received in the annular channel for free running; and
further comprising at least a magnetic member mounted in a chamber of the weight device to attract the rolling device, wherein the chamber is located at a center of the annular channel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A ultra wideband transceiver comprising:
a scalable analog-to-digital converter coupled to a digital down conversion.
2. The transceiver of claim 1 wherein said scalable analog-to-digital (AD) converter may be directly used to sample and quantize the ultra wideband signals for the multi-information data rates from 50 Mbps to 1 Gbps.
3. The transceiver of claim 1 wherein said digital down conversion may implement shifting the bandpass signals from output of the scalable analog-to-digital converter into the baseband signals, and performing the scalable decimation for the baseband signals.
4. The transceiver of claim 1 wherein said scalable analog-to-digital converter may have the sampling rates with scalability.
5. A scalable analog-to-digital (AD) converter comprising:
an analyzed sequence switch; a synthesized sequence switch; as well as a set of low-speed AD converters; a set of fine-adjustable attenuations; a set of digital FIR filters with operating in parallel; or one digital FIR filter.
6. The transceiver of claim 5 wherein said analyzed sequence switch may be a counterclockwise model circuit, which may be equivalent to polyphase implementation for downsampling. The analyzed sequence switch may take on one of the positions with rotating at uniform speed.
7. The transceiver of claim 5 wherein said synthesized sequence switch may be a clockwise model circuit, which may be equivalent to polyphase implementation for upsampling. The synthesized sequence switch may take on one of the positions with rotating at uniform speed, to recover the desired sampling rate Fs and to obtain the digitally reconstructed signals.
8. The transceiver of claim 5 wherein said a set of AD converters may operate at a low sampling rate of FsM with an 8-bit resolution. All of the AD converters may implement in parallel.
9. The transceiver of claim 5 wherein said a set of fine-adjustable attenuations, with operating in parallel, may use to reduce the mismatch gain error due to all of the low-speed AD converters are not exactly equal in practical implementation.
10. The transceiver of claim 5 wherein said a set of digital FIR filters may be exactly equal, with operating in parallel.
11. The transceiver of claim 10 wherein said a set of digital FIR filters may be used to eliminate the narrow interference of other radio operations within each branch of the scalable AD converter.
12. The transceiver of claim 5 wherein said one digital FIR filter may be used after the synthesized sequence switch in the scalable AD converter.
13. The transceiver of claim 12 wherein said one digital FIR filter in the scalable AD converter may be used to eliminate the narrow interference for the UWB communication transceiver.
14. The transceiver of claim 5 wherein said scalable AD converter system may completely cancel all of the aliasing, and may not have phase distortion by using a set of digital FIR filters or one digital FIR filter.
15. The transceiver of claim 5 wherein said scalable AD converter may not include analog filters before a set of low-speed AD converters.
16. The transceiver of claim 9 wherein said fine-adjustable attenuations are programmable values.
17. The transceiver of claim 10 wherein said digital FIR filters are programmable tap filters.
18. A digital down conversion comprising:
A complex multiplier; a complex oscillator; a decimation lowpass FIR filter; down sampling N selector; clock control; and a set of down sampling blocks with selectable MUX block.
19. The transceiver of claim 18 wherein said complex multiplier and complex oscillator in the digital down conversion may use for shifting the bandpass signals into the baseband signals.
20. The transceiver of claim 18 wherein said decimation lowpass FIR filter and down sampling blocks with selectable MUX block in the digital down conversion may have the scalability dealing with input signals with different high sampling rates and converting these signals into baseband signals with different low sampling rates.
21. The transceiver of claim 20 wherein said decimation lowpass FIR filter is programmable tap filter, and has different cutoff frequencies.
22. The transceiver of claim 18 wherein said down sampling N selector may control the cutoff frequencies of the decimation lowpass FIR filter.
23. The transceiver of claim 21 wherein said decimation lowpass FIR filter may be an Nth-band lowpass FIR filter in which this decimation lowpass FIR filter may be placed after the down sampling and selectable MUX blocks for efficient implementation.
24. The transceiver of claim 18 wherein said a set of down sampling blocks may be selected along with the selectable MUX block.
25. The transceiver of claim 18 wherein said digital down conversion may be implemented in programmable either in hardware or in software.