Integration and filtration circuit apparatus

Claim 2

Integrating apparatus comprising, in combination: first serial digital word summing means including first and second inputs and an output; first word storage means having input and output means and having a predetermined word length capacity; first overflow detection means including, input means for receiving serial digital words, output means for providing an output word and overflow indication means for indicating the predetermined word capacity of said first storage means has been exceeded; means for supplying a digital word first input signal to be integrated to one of said inputs of said first summing means; means connecting the output of said first summing means to the input of said first detection means; means connecting said first word storage means between said output means of said first overflow detection means and the other input of said summing means; first multiplying means including first and second input means and an output; means connecting said overflow indication means of said first overflow detection means to said first input means of said first multiplying means; means for supplying a digital word second input signal to said second input means of said first multiplying means; second serial digital word summing means including first and second inputs and an output; means connecting the output of said multiplying means to said first input of said second summing means; second word storage means having input and output means and having a predetermined word length capacity; means connecting said second word storage means between the output of said second summing means and said second input of said second summing means; and apparatus output means for supplying an apparatus output signal connected to said output means of said second word storage means.

Claim 3

Apparatus as claimed in claim 1 wherein: said first overflow detection means provides indications of overflow in both the negative and positive directions; said first and second serial digital word summing means are adding means; and both storage means have the same predetermined word length capacity.

Claim 4

Apparatus as claimed in claim 1 wherein said means connecting said overflow indication means to said first multiplying means comprises, in combination: second multiplying means including first input means for receiving signals from said overflow indication means of said first overflow detection means, second serial digital word input means and an output; means for supplying a digital input third signal to said second input means of said second multiplying means; third serial digital word summing means including first and second inputs and an output; meAns connecting said output of said second multiplying means to said first input of said third summing means; third word storage means having input and output means and having a predetermined word length capacity; second overflow detection means including, an input means connected to the output of said third summing means, an output means for providing an output word and overflow indication means for indicating the predetermined word capacity of said third storage means has been exceeded; means connecting said third word storage means between said output means of said second overflow detection means and said second input of said third summing means; and means for supplying overflow signals from said overflow indication means of said second overflow detection means to the first input means of said first multiplying means.

Claim 5

Apparatus as claimed in claim 3 wherein said means for supplying a digital word first input signal to be integrated comprises, in combination: fourth summing means connected to a signal to be filtered and connected to said apparatus output means, said means supplying as a signal to said first input of said first summing means the difference therebetween; and the signal supplied to said first input of said first summing means conforming generally to IN(ST/(1 + ST)) where IN is the input signal to be filtered, S is a Laplace operator and T is a time constant.

Claim 6

Apparatus as claimed in claim 3 wherein said means connecting said output of said second multiplying means to said first input of said third summing means comprises, in combination; fourth summing means including first and second inputs and an output, said first input being connected to receive digital word output signals from said second multiplying means and the output of said fourth summing means connected to supply digital input signals to said first input of said third summing means; and means connecting said second input of said fourth summing means to said apparatus output means for receiving output signals from said second word storage means.

Claim 7

Apparatus as claimed in claim 5 wherein said first and third summing means are subtractors and said second and fourth summing means are adders and further said apparatus provides an output indicative of A X B (1/(1 + ST)) where A and B are said first and third digital input signals, S is a Laplace operator and T is a time constant equal to the reciprocal of the second digital input signal.

Claim 8

Apparatus as claimed in claim 3 wherein said means connecting said output of said second multiplying means to said first input of said third summing means comprises, in combination: fourth summing means including first and second inputs and an output and having said first input connected to receive signals from the output of said second multiplying means; means connecting the output of said fourth summing means to said first input of said third summing means; means for supplying a digital input fourth signal to said second input of said fourth summing means; and means supplying the output signal of said second word storage means as the digital word first input signal to said first summing means.

Claim 9

Apparatus as claimed in claim 7 wherein said first summing means is a subtractor and the remaining summing means are adders and the signal obtained at said apparatus output means is indicative of A/B(1 + ST) where A is the digital input fourth signal, B is the digital input third signal, S is a Laplace operator and T is a time constant.

Claim 10

Apparatus as claimed in claim 7 wherein said digital input third signal is obtained from the output of said second word storage means.

Claim 11

Apparatus as claimed in claim 9 wherein said first summing means is a subtractor and the remaining summing means are adders and further the output signal from said second storage means is indicative of the square root of said digItal input fourth signal.

Claim 12

Apparatus for providing an output integrated signal comprising, in combination: serial digital word to pulse rate first conversion means including an input means for receiving a serial digital word input signal, said first conversion means having a predetermined word capacity and including output means for indicating the frequency with which said word capacity is exceeded; pulse rate to serial digital word second conversion means including a first input for receiving a pulse rate and a second input for receiving a serial digital word, the numerical value of digital words received by said second conversion means directly affecting the digital word output from the apparatus for a given received pulse rate; and means for connecting the output means of said first conversion means to said first input to said second conversion means.

Claim 13

Apparatus for providing an output integrated signal comprising, in combination: serial digital word to pulse rate first conversion means including an input means for receiving a serial digital word input signal, said first conversion means having a predetermined word capacity and including output means for indicating the frequency with which said word capacity is exceeded; pulse rate to serial digital word second conversion means including a first input for receiving a pulse rate and a second input for receiving a serial digital word, the numerical value of digital words received by said second conversion means directly affecting the digital word output from the apparatus for a given received pulse rate; and means for connecting the output means of said first conversion means to said first input to said second conversion means.

Claim 14

Apparatus as claimed in claim 11 wherein said means for connecting said first and second conversion means comprises, in combination: combination pulse rate to serial digital word and serial digital word to pulse rate third conversion means, said third conversion means including a serial digital word input means, the numerical value of serial digital words received at said serial digital word input means thereof directly affecting the pulse rate output of said third conversion means for a given received pulse rate.

Claim 15

Apparatus as claimed in claim 12 comprising in addition: summing means connected for receiving an input serial digital word signal to be filtered and for receiving a digital word from the output of said second conversion means, an output of said summing means comprising the difference between received digital words; and means connecting the output of said summing means to the input means of said first conversion means.

Claim 16

Apparatus as claimed in claim 11 wherein said means connecting said first and second conversion means comprises, in combination: pulse rate to digital word third conversion means including first and second digital word inputs and pulse rate input means, a signal supplied to said first digital word input thereof affecting the magnitude of the digital word output thereof for a given pulse rate input, the digital word received at said second digital word input being compared with the magnitude of the converted and affected pulse rate to produce a third conversion means output; digital word to pulse rate fourth conversion means connected to the output of said third conversion means and providing a pulse rate output indicative of the digital word obtained after comparison is completed; means connecting the output of said second conversion means to the second digital input of said third conversion means; and means connecting said output means of said first conversion means to the pulse rate input of said third conversion means and the pulse rate output of said fourth conversion to said first input of said second conversion means.

Claim 17

Apparatus as claimed in claim 11 wherein said means connecting said first and second conversion means comprises, in combination: pulse rate to digital word third conversion means including first and second digital word inputs and pulse rate input means, a signal supplied to said first digital word input thereof affecting the magnitude of the digital word output thereof for a given pulse rate input, the digital word received at said second digital word input being compared with the magnitude of the converted and affected pulse rate to produce a third conversion means output; digital word to pulse rate fourth conversion means connected to the output of said third conversion means and providing a pulse rate output indicative of the digital word obtained after comparison is completed; means connecting the output of said second conversion means to the input means of said first conversion means; means for supplying a dividend serial digital signal to said second digital word input of said thIrd conversion means and for supplying a serial digital word divisor to said first digital word input of said third conversion means; and means connecting said output means of said first conversion means to the pulse rate input of said third conversion means and the pulse rate output of said fourth conversion means to said first input of said second conversion means.

Claim 18

Apparatus as claimed in claim 11 wherein said means connecting said first and second conversion means comprises, in combination: pulse rate to digital word third conversion means including first and second digital word inputs and pulse rate input means, a signal supplied to said first digital input means thereof affecting the magnitude of the digital word output for a given pulse rate input, the digital word received at said second digital word input being compared with the magnitude of the converted and affected pulse rate to produce a third conversion means output; digital word to pulse rate fourth conversion means connected to the output of said third conversion means and providing a pulse rate output indicative of the digital word obtained after comparison transpires; means connecting the output of said second conversion means to said input means of said first conversion means and to said first digital word input of said third conversion means; means for supplying a serial digital word, the square root of which is to be found, to said second digital word input of said third conversion means; and means connecting said output means of said first conversion means to the pulse rate input of said third conversion means and the pulse rate output of said fourth conversion means to said first input of said second conversion means.

Claim 19

Apparatus as claimed in claim 11 wherein said means for connecting the first and second conversion means includes: signal combining means, including pulse input means, for combining the pulse rate received from said first conversion means with a further pulse rate received at said pulse input means and supplying the difference in pulse rates to said second conversion means; said apparatus comprising in addition: serial digital word to pulse rate third conversion means including a first input means for receiving a serial digital word input signal and including output means for providing a pulse rate output indicative of the digital word input; and means connecting said third conversion means between the output means of said second conversion means and the pulse input means of said combining means adapted for receiving a further pulse rate input signal.

Claim 20

Apparatus as claimed in claim 11 wherein said means for connecting the first and second conversion means includes; signal combining means, including pulse input means, for combining the pulse rate received from said first conversion means with a further pulse rate received at said first input means and supplying the difference in pulse rates to said second conversion means; said apparatus comprising in addition: means connecting the output of said second conversion means to an input means of said first conversion means; serial digital word to pulse rate third conversion means including a first input means for receiving a serial digital word input signal and including output means for providing a pulse rate output indicative of the digital word input; means connecting said output means of said third conversion means to the pulse input means of the signal combining means; and means for supplying a further digital input signal to said first conversion means, the further digital word signal comprising a divisor and the digital word supplied to said third conversion means comprising a dividend.

Claim 21

Apparatus as claimed in claim 18 further comprising: said means for supplying a further digital input signal to said first conversion means is connected to said output means of said second conversion means for receiving the apparatus output word therefrOm whereby an output representative of the square root of the input signal supplied to said third conversion means is provided.

Claim 22

Apparatus as claimed in claim 5 comprising in addition; third multiplying means including first and second input means and an output; means for supplying the overflow indication word from said overflow indication means of said second detection means to said first input means of said third multiplying means; fifth summing means including first and second inputs and an output, said first input being connected to receive digital word output signals from said third multiplying means; sign detection means including input means and first and second output means whereby said first output means is activated upon a digital input word being received of a first polarity and the second output means being activated upon the reception of a digital word of a second polarity; fourth multiplying means including, first input means for receiving signals from said first and second output means of said sign detection means, serial digital word input means and an output; sixth summing means including first and second inputs and an output, said first input being connected to receive digital word output signals from said fourth multiplying means and the output thereof being connected to supply digital word inputs to said second input of said fifth summing means; shift register means connected to receive output signals from said fifth summing means and to supply an output delayed by one word time to said second input of said sixth summing means; NOR gate means including first and second inputs connected to said first and second outputs of said sign detection means and including an output; means for supplying a digital input fourth signal; second gating means connected for receiving the digital input fourth signal from said last named means and for receiving an output from said NOR gate and providing a logical output indicative thereof; means connecting the output of said second gate to said second input of said third multiplying means; third gating means connected for receiving said digital input fourth signal from said means for supplying same and connected for receiving an inverted version of the output signal from said first gating means, said third gating means providing an inverted logically ANDed output indicative of the received inputs; and means connecting the logical output of said third gating means to said means for supplying a digital word second input signal to said second input of said first multiplying means.

Claim 23

Apparatus as claimed im claim 14 further comprising pulse detection means connected between the output of said third conversion means and the second input of said second conversion means, said pulse detection means having a predetermined count down time period whereby a first digital word is supplied to said second conversion means if first and second pulses are received sequentially from said third conversion means within said predetermined time period and provides a second digital word to said second conversion means if two pulses are not received sequentially within said time period whereby the rate of multiplication is increased when the product of the digital words received at said first conversion means and at the first digital word input of said third conversion means varies greatly from the digital word obtained from the output of said second conversion means.