UWB multi-burst transmit driver for averaging receivers
First Claim
1. An ultra-wideband (UWB) multi-burst transmitter, comprising:
- a timing circuit actuated by a single trigger pulse to set the length of a transmit cycle;
a gated burst rate oscillator connected to and controlled by the timing circuit to generate an output signal comprising a plurality of cycles during the transmit cycle;
a bias driver connected to the gated burst rate oscillator; and
a RF burst oscillator connected to the bias driver and actuated thereby in response to the output signal from the gated burst rate oscillator to generate a sequence of RF bursts, one RF burst for each cycle of the output signal from the gated burst rate oscillator during the transmit cycle.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-burst transmitter for ultra-wideband (UWB) communication systems generates a sequence of precisely spaced RF bursts from a single trigger event. There are two oscillators in the transmitter circuit, a gated burst rate oscillator and a gated RF burst or RF power output oscillator. The burst rate oscillator produces a relatively low frequency, i.e., MHz, square wave output for a selected transmit cycle, and drives the RF burst oscillator, which produces RF bursts of much higher frequency, i.e., GHz, during the transmit cycle. The frequency of the burst rate oscillator sets the spacing of the RF burst packets. The first oscillator output passes through a bias driver to the second oscillator. The bias driver conditions, e.g., level shifts, the signal from the first oscillator for input into the second oscillator, and also controls the length of each RF burst. A trigger pulse actuates a timing circuit, formed of a flip-flop and associated reset time delay circuit, that controls the operation of the first oscillator, i.e., how long it oscillates (which defines the transmit cycle).
-
Citations
24 Claims
-
1. An ultra-wideband (UWB) multi-burst transmitter, comprising:
-
a timing circuit actuated by a single trigger pulse to set the length of a transmit cycle; a gated burst rate oscillator connected to and controlled by the timing circuit to generate an output signal comprising a plurality of cycles during the transmit cycle; a bias driver connected to the gated burst rate oscillator; and a RF burst oscillator connected to the bias driver and actuated thereby in response to the output signal from the gated burst rate oscillator to generate a sequence of RF bursts, one RF burst for each cycle of the output signal from the gated burst rate oscillator during the transmit cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method of generating a precisely spaced sequence of ultra-wideband (UWB) RF bursts, each starting with the same phase, from a single trigger pulse, comprising:
-
generating a timing signal from the trigger pulse, the timing signal defining a transmit cycle; controlling a first oscillator by the timing signal to produce a number of cycles of a relatively low frequency square wave output during the transmit cycle; and driving a second oscillator with the output of the first oscillator to produce a spaced sequence of RF bursts of much higher frequency during the transmit cycle, an RF burst being produced by the second oscillator on each cycle of the first oscillator signal. - View Dependent Claims (21, 22, 23, 24)
-
Specification