JPS60180134U - cyclic filter device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the circuit configuration of a conventional recursive filter device, Fig. 2 is a block diagram showing an equivalent circuit of a basic embodiment of the present invention, and Fig. 3 is another embodiment of the present invention. FIG. 4 is a block diagram showing an equivalent circuit of still another embodiment of the present invention. FIG. 5 is a block diagram showing an equivalent circuit of another embodiment of the present invention, and FIG. FIG. 6 is a top view of the main part showing the shape of the electrode, FIG. 6 is a top view of the main part showing another embodiment in which the circuit of FIG. 4 is integrated, and FIG. 7 is an equivalent circuit of still another embodiment of the present invention. FIG. 8 is a diagram showing the frequency characteristics of the embodiment shown last time, and FIG. 9 is a top view of the main part of the embodiment having a weighting coefficient correction channel. 1: Input terminal, 2: First addition circuit, 3 and 4: Delay circuit, 5 to 9: Weighting circuit, 10: Second addition circuit, 21
: CTD, 22: Input terminal, 23 to 27: Weighted circuit, 28: Output terminal, 29: Second CTD, 31 to 3
5: Channel for weighting coefficient, 36: Charge weir, S□~
S5: Source region, R□ and R2 Ni dorain region, 7
0: Amplifier, 94: Correction channel, Sa and Sb
: Source area.゛Amendment November 9, 1982 The name of the invention is amended as follows. ■Name of the invention The scope of the utility model registration claims for the cyclic filter device and the brief description of the drawings are amended as follows. O Utility Model Registration Claims Two systems of charge transfer devices, an input terminal to which an input signal is applied, an output terminal from which a filtered output signal is taken out, and a charge transfer device in a predetermined bit of one of the two systems. The positive weighting provided on the other charge transfer element includes a circuit group, and the positive weighting provided on the other charge transfer element includes a circuit group. In the recursive filter device configured such that output signals are simultaneously applied and the output signals are simultaneously applied to the remaining circuit group, the two systems of charge transfer elements have meandering charge transfer paths defined by charge weirs, and The bits of the two systems of charge transfer elements are arranged in parallel and adjacent to each other and are configured to communicate with each other so that signal charges are mixed and transferred, and the weighting circuit is composed of -first and 72nd electrodes. 2
It has a heavy gate structure, and the input signal and the output signal are configured such that positive weighting is simultaneously applied to each first electrode of the circuit group, and negative weighting is simultaneously applied to each second electrode of the circuit group. A recursive filter device characterized by: Brief Description of the Drawings Fig. 1 is a block diagram showing the circuit configuration of a conventional recursive filter device, Fig. 2 is a block diagram showing a conventional basic equivalent circuit, and Fig. 3 is an equivalent circuit of the first conventional example. FIG. 4 is a block diagram showing an equivalent circuit of the second conventional example, FIG. The figure is a top view of essential parts showing an embodiment of the present invention, FIG. 7 is a potential distribution diagram in the positive coefficient channel and negative coefficient channel of FIG. 6, FIG. 8 is a DC characteristic diagram of the low-pass filter of the present invention, and FIG. FIG. 9 is a DC characteristic diagram of the conventional low-pass filter shown in FIG. 1: Input terminal, 2: First addition circuit, 3 and 4: Delay circuit, 5 to 9: Weighting circuit, 10: Second addition circuit, 21
:CTD, 22: Input terminal, 23-27: Weighting circuit, 28: Output terminal, 29: Second CTD, 31-
35: Weighting coefficient imparting channel, 36: Charge weir, Si
- S5: source region, R1 and R2 Ni dorain region,
φ1. φ2: Transfer electrode. 228-121234 ″″ しCT″S2

Claims (1)

[Scope of utility model registration request] The delay charge transfer element, the input terminal to which the input signal is applied, the output terminal to take out the filtered signal, and the weighting that is electrically coupled to a predetermined bit of the charge transfer element are determined by the circuit group and number. The weighting is a cyclic method characterized in that the input signal is simultaneously applied to some of the circuit groups, and the signal appearing at the output terminal is simultaneously applied to the remaining circuit groups. Type filter device.