US4200810A — Method and apparatus for averaging and stretching…

Claim 1

Independent Claim 147 words

Signal processing apparatus for processing a periodic input signal, the apparatus comprising: (a) common input terminal means to which said periodic input signal is applied; (b) common output terminal means; (c) a plurality of different delay paths coupling said common input terminal means to said common output terminal means, said different delay paths having respective different delays differing by a whole number multiple of the period of said periodic input signal; (d) a plurality of signal summing means included in said delay paths and arranged such that at least some of said delay paths have portions in common with one another downstream of the respective summing means; (e) sampling means in each said delay path; and (f) clock means coupled to said sampling means for driving said sampling means at a sampling interval which is greater than said period and is a non-integer multiple of said period.

Claim 2

Dependent Claim 147 words

Signal processing apparatus for processing a periodic input signal, the apparatus comprising: (a) common input terminal means to which said periodic input signal is applied; (b) common output terminal means; (c) a plurality of different delay paths coupling said common input terminal means to said common output terminal means, said different delay paths having respective different delays differing by a whole number multiple of the period of said periodic input signal; (d) a plurality of signal summing means included in said delay paths and arranged such that at least some of said delay paths have portions in common with one another downstream of the respective summing means; (e) sampling means in each said delay path; and (f) clock means coupled to said sampling means for driving said sampling means at a sampling interval which is greater than said period and is a non-integer multiple of said period.

Claim 3

Dependent Claim 36 words

Apparatus as claimed in claim 1, wherein said summing means, said sampling means, and said downstream portions of said delay paths are formed at least in part by a time delay and integrate charge coupled device.

Claim 4

Dependent Claim 15 words

Apparatus as claimed in claim 1, wherein said delay paths include a tapped delay line.

Claim 5

Dependent Claim 74 words

Apparatus as claimed in claim 3, wherein said tapped delay line comprises a series of devices each of which is actuated by a pulse in response to which said device accepts a new signal value and emits a stored signal value, and means are provided for supplying said tapped delay line with actuating pulses at such a rate that new signal values are sampled from said periodic input at at least the Nyquist rate.

Claim 6

Independent Claim 73 words

A method of processing a signal containing a periodic component, the method comprising the steps of: delaying said signal by a plurality of different delays differing from one another by a whole number multiple of the period of said periodic component; recombining differently delayed portions of said signal arriving simultaneously at a point; and sampling said differently delayed portions at a sampling interval which is greater than the period of said periodic component.

Claim 7

Independent Claim 73 words

A method of processing a signal containing a periodic component, the method comprising the steps of: delaying said signal by a plurality of different delays differing from one another by a whole number multiple of the period of said periodic component; recombining differently delayed portions of said signal arriving simultaneously at a point; and sampling said differently delayed portions at a sampling interval which is greater than the period of said periodic component.

Claim 8

Dependent Claim 30 words

A method as claimed in claim 5, wherein said delaying step is effected in two parts and said sampling step is effected between said two parts of said delaying step.

Claim 9

Dependent Claim 24 words

A method as claimed in claim 6, wherein said delaying and sampling steps comprise charging and discharging a plurality of interconnected charge coupled devices.

Claim 10

Dependent Claim 151 words

Signal processing apparatus comprising: input terminal means; tapped delay line means having input end means coupled to said input terminal means and having a plurality of taps and an output end means; a plurality of sampling means each coupled respectively to said taps and output end means; final output summing means coupled to said sampling means; and further delay means coupling those of said sampling means which are coupled to said taps to said final output summing means, said sampling means sampling at an interval which is greater than the total delay through said tapped delay line means and is a non-integer multiple of said total delay, and said further delay means cooperating with said delay line means to provide a plurality of different signal paths from said input end to said final summing means, said different signal paths differing from one another by whole number multiples of said total delay.

Claim 11

Dependent Claim 151 words

Signal processing apparatus comprising: input terminal means; tapped delay line means having input end means coupled to said input terminal means and having a plurality of taps and an output end means; a plurality of sampling means each coupled respectively to said taps and output end means; final output summing means coupled to said sampling means; and further delay means coupling those of said sampling means which are coupled to said taps to said final output summing means, said sampling means sampling at an interval which is greater than the total delay through said tapped delay line means and is a non-integer multiple of said total delay, and said further delay means cooperating with said delay line means to provide a plurality of different signal paths from said input end to said final summing means, said different signal paths differing from one another by whole number multiples of said total delay.

Claim 12

Dependent Claim 96 words

Apparatus as claimed in claim 8, wherein said further delay means comprise a series of delay devices coupled to one another in the series by intermediate summing means, each intermediate summing means having input terminal means coupled to a respective tap of said delay line means, further input terminal means, and output terminal means, said further input terminal means being coupled to the output terminal means of another one of said delay devices in said series, and said output terminal means being coupled to the input terminal means of the next delay device in said series.

Claim 13

Dependent Claim 31 words

Apparatus as claimed in claim 9, wherein said series of delay devices includes a first delay device with input terminal means coupled to said input end of said delay line means.

Claim 14

Dependent Claim 17 words

Apparatus as claimed in claim 8, further including interpolating means coupled to said final output summing means.

Claim 15

Dependent Claim 14 words

Apparatus as claimed in claim 11, wherein said interpolating means comprises a low-pass filter.

Claim 16

Dependent Claim 35 words

Apparatus as claimed in claim 8, wherein said tapped delay line means comprises a tapped charge-coupled delay line, and said sampling means and said further delay means include a time delay and integrate charge-coupled device.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-04-29	1983-10-29	1984-04-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-04-29	1987-10-29	1988-04-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-04-29	1991-10-29	1992-04-29	$7700.00	Window Closed / Lapsed

Method and apparatus for averaging and stretching periodic signals

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