摘要:
The present invention has an object to provide a filter circuit largely reducing electric power to consume compared with a conventional one, as well as realizing the first acquisition in enough high speed. In a filter circuit according to the present invention, a matched filter and a sliding correlator are used in parallel, the first acquisition and holding is executed by a matched filter, a correlating operation is executed by a sliding correlator and a voltage is stopped to supply to the matched filter.
摘要:
Multiplication is performed including accumulation at high speed by a small quantity of hardware. Analog voltage X i corresponding to each clement of the first input data string is input to capacitance switching circuits 10 1 to 10 n through input terminals 1 1 to 1 n . m bit of digital control data A i corresponding to each element of the second input data string are input to each capacitance switching circuit 10 i , and each bit a j of the control signal A j is input to the corresponding multiplexer circuit 6 ij . In the multiplexer circuit 6 ij , the capacitances C ij corresponding to the value of each bit of the control signal a j are connected to the input terminal 1 i or the reference charge V STD . The voltages corresponding to the products of inputted analog voltages X i and the control signals A i are outputted from each capacitance switching circuit 10 i . The output voltages of each capacitance switching circuit 10 i are parallelly inputted to the operational amplifier 3 connected by a feedback capacitance Cf, and the sum of the input voltages is outputted from the operational amplifier 3. On the other hand, in order to provide a multiplication circuit of high calculation speed without deteriorating the calculation accuracy and circuit density, a multiplication circuit according to the present invention has a MOS switch or MOS multiplexer the MOS of which has a gate with width and length so that a time constant defined by the input capacitance and the switch etc. is constant.
摘要:
The present invention has an object to provide a memory device without the necessity of refreshment, whose circuit is small size. The memory device has a memory cell "MC" comprising: i) the first FET of P-channel having a gate "G1" connected input voltage "Vi" and source "S1" grounded through protect resistance "R1"; ii) the second FET of N-channel having a gate "G2" connected to a drain "D1" of the first FET, a drain "D2" connected to power source "Vcc", and a source "S2" connected to a gate "G1" of the first FET through protect resistance "R2"; and iii) a switch "SWR" connecting the gate "G2" of the second FET and power source "Vcc". Self-holding circuit is formed by the pair of FETs.
摘要:
The present invention has an object to provide a memory device without the necessity of refreshment, whose circuit is small size. The memory device has a memory cell "MC" comprising: i) the first FET of P-channel having a gate "G1" connected input voltage "Vi" and source "S1" grounded through protect resistance "R1"; ii) the second FET of N-channel having a gate "G2" connected to a drain "D1" of the first FET, a drain "D2" connected to power source "Vcc", and a source "S2" connected to a gate "G1" of the first FET through protect resistance "R2"; and iii) a switch "SWR" connecting the gate "G2" of the second FET and power source "Vcc". Self-holding circuit is formed by the pair of FETs.
摘要:
A learning method for a data processing system comprising an input layer and output layer which comprises a plurality of neurons each of which outputs an predetermined data after igniting according to the predetermined processing results performed onto an input data, and an middle layer, arranged between the input and output layer, the middle layer comprising a plurality of neurons each of which is connected to each neuron of the input and output layer; characterized in the following steps: the ignition patterns of the input layer and the output layer are determined artificially according to a plurality of inputs and outputs; weights of synapses of the middle layer and the output layer are increased so as to obtain the tendency that the ignition pattern of middle layer becomes the nearest approximation to the ignition patterns of input layer and output layer according to each input and output; the same processings as above are performed with respect to all inputs and outputs.
摘要:
An adaptation method for a data processing system comprising a plurality of neurons each of which outputs an output according to a comparison between a sum of multiplied inputs by weights and a threshold, characterized in the following steps: The threshold of the neuron which has generated significant output at certain point of time is compulsorily increased to a maximal value; The weight of the neuron is adapted for a constant value of the inputs; and the threshold is decreased to a value at the point.
摘要:
The invention provides according to a first aspect a low electric power consumption matched filter. The signal received at an input terminal is input to a shift-register having stages equal to the spread code length number after conversion into M-bit digital signals in an analog-to-digital converter. The outputs of the shift-register stages are input to EXCLUSIVE-OR circuits set corresponding to each stage, so that EXCLUSIVE-OR is performed between the outputs and corresponding spread code bits d 1 to d N . The outputs of the EXCLUSIVE-OR circuits are analogously added in an analog adder and output from an output terminal. According to a second aspect the invention provides a filter circuit using an analog operation circuit to prevent lowering of operation accuracy caused by the residual charge. Input analog signals successively undergo sampling and holding in each sampling and holding circuit, are multiplied by coefficients stored in a shift register by multiplication circuits, and added in addition circuit. Sample data transmission error storage is prevented by shifting coefficients in the shift register. Sampling and holding circuits and multiplication circuits are formed by analog operation circuits, and each include a switch for canceling the residual charge. The sampling and holding circuits and multiplication circuits normally working are refreshed sequentially by providing circuits for replacing their function. The addition circuit is set double and refreshed in the same way.
摘要:
The invention provides according to a first aspect a low electric power consumption matched filter. The signal received at an input terminal is input to a shift-register having stages equal to the spread code length number after conversion into M-bit digital signals in an analog-to-digital converter. The outputs of the shift-register stages are input to EXCLUSIVE-OR circuits set corresponding to each stage, so that EXCLUSIVE-OR is performed between the outputs and corresponding spread code bits d 1 to d N . The outputs of the EXCLUSIVE-OR circuits are analogously added in an analog adder and output from an output terminal. According to a second aspect the invention provides a filter circuit using an analog operation circuit to prevent lowering of operation accuracy caused by the residual charge. Input analog signals successively undergo sampling and holding in each sampling and holding circuit, are multiplied by coefficients stored in a shift register by multiplication circuits, and added in addition circuit. Sample data transmission error storage is prevented by shifting coefficients in the shift register. Sampling and holding circuits and multiplication circuits are formed by analog operation circuits, and each include a switch for canceling the residual charge. The sampling and holding circuits and multiplication circuits normally working are refreshed sequentially by providing circuits for replacing their function. The addition circuit is set double and refreshed in the same way.