PURPOSE:To prevent the generation of burrs of a synthetic resin in sections, from which each lead terminal 16 is projected, of the side faces of a molding body made of the synthetic resin when the molding body is molded to a lead frame for an electronic component. CONSTITUTION:Each lead terminal 16 is constituted so that thin width pieces 18 communicated with a lead frame 10 can be turned over in a turnover shape as being twisted while damming section 20 closely attached and made to abut against both side faces 16a, 16b of each lead terminal 16 turned over in the turnover shape are molded integrally to sections among each lead terminal 16 in the lead frame 10, and the side face 19a of a molding body 19 is specified by the damming sections 20.

Structure of lead frame for electronic component

PURPOSE:To perform A/D conversion at high speed for an analog signal including high frequencies, by periodically A/D-converting the same analog signal with shifted time and synthesizing the outputs as a digital signal of one system through periodical fetching of the time. CONSTITUTION:An analog signal AD is inputted to N sets of sample holding circuits 11-1n in common and analog signals sequentially in sample holding are inputted to A/D converters 21-2n respectively with the time interval of T/N. A/D-converted outputs are obtained from the converters 21-2n at least within the time T from the point of time of sampling. The outputs are inputted to a multiplexer 3 to control the multiplexer 3, allowing to sequentially pick up the A/D converting output as a digital signal DD of one system in the time interval of T/N.

Analog-to-digital converter

PROBLEM TO BE SOLVED: To shorten a time required for measuring one and the same analog signal a plurality of times. SOLUTION: A sampling circuit 200 constituting an A/D converter 10 samples an analog signal 2 inputted to an input terminal 100 at a plurality of timing which are different from each other within a predetermined period. A conversion circuit 300 converts sampling values (3_1 to 3_5) in the respective timing into digital signals (5_1 to 5_5). A signal processing circuit 20 in a signal processor 1 to which the A/D converter 10 is mounted (or averaging circuit provided in the A/D converter 10) averages the plurality of digital signals (5_1 to 5_5) outputted from the conversion circuit 300. COPYRIGHT: (C)2011,JPO&INPIT

A/d converter, signal processor, and a/d conversion method

PROBLEM TO BE SOLVED: To enable an AD conversion circuit, which performs a plurality of AD conversions from one analog output, to be small-sized and reduce costs by preventing an error from being incurred by switching noise. SOLUTION: An AD conversion circuit 1 comprises an analog output unit 2, a first AD conversion circuit unit 3, and a second AD conversion circuit unit 4. The first AD conversion circuit unit 3 comprises a first sample/hold section 31 which includes a first switch 31a and is connected to an output terminal 21, a first control section 32 and a first processing section 33. The second AD conversion circuit unit 4 comprises a second sample/hold section 41 which includes a second switch 41a and is connected to the output terminal 21, a second control section 42, and a second processing section 43. The first control section 32 generates a mask signal for the lapse of a first predetermined time t1 from ON of the first switch 31a to OFF of the first switch 31a. The second control section 42 turns off the second switch 41a while the mask signal is inputted. COPYRIGHT: (C)2008,JPO&INPIT

Ad conversion circuit

PURPOSE:To realize the A/D converter unnecessitating a troublesome job such as manual adjustment by the user or the like through visual observation of an output screen with respect to a phase shift between a clock signal and a video signal changing when an input device is changed when the video signal of a computer or the like is subjected to A/D conversion with a dot clock signal. CONSTITUTION:A video signal 1 is sampled by using a clock signal resulting from a dot clock signal 4 passing through a variable delay device 6 and fixed DELTAT delay devices 13, 14 or the like, and a phase detection section 18 detects a phase shift between the video signal and the sampling clock signal by using obtained sampling values Y(n.T) 16, Y(n.T-DELTAT) 17 and Y(n.T+DELTAT) 15. Then a delay quantity control section 19 controls the variable delay deice 6 in response to the detected phase shift to sample the video signal in a proper timing.

A/d converter

PURPOSE:To provide a heater characterized in that a gas burner heating through a heat exchanger and, during this heating, a heating with a regenerator heated by the burner can be switched without any loss.

Minoura Katsushi

Papers

Gas heater of a regenerative type