JPS60142537U

JPS60142537U - Nonlinear digital-to-analog converter

Info

Publication number: JPS60142537U
Application number: JP2820784U
Authority: JP
Inventors: 松浦　達広
Original assignee: 日本電気株式会社
Priority date: 1984-02-28
Filing date: 1984-02-28
Publication date: 1985-09-20

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のディジタル−アナログ変換器の構成を示
すフ］ロック図、第２図は来者、案の実施例を示すブロ
ック図、第３図ａ及びｂは第２図に示したノコギリ波発
生回路の出力波形を示す図である。　　　　− １−１〜１−ｎ・・・・・・ｎビットディジタル入力信
号、２・・・・・・ゲート回路、３−１〜３−ｎ・・・
・・・抵抗回路網入力信号、４・・・・・・抵抗回路網
回路、５・・・・・・アナログ電圧、６・・・・・・増
幅回路、７・・・・・・アナ９グ出力電圧、訃・・・・
・入力データ変更回路、９・・・・・・制゛　　　　−
両信号発生回路、１０・・・・・・カウンタ回路、１１
・・・・・・データ比較回路、１２・・・・・・ノ、コ
ギリ波発生回路、１３・・・・・・アナログスイッチ回
路、１４−１〜１４−ｍ・・・・・・基準データ選択信
号、１５−１〜１　　′５−ｎ・・・・・−ｎビット基
準データ、１１６・・・・・・タイミング信号、１７・
・・・・・カウンタリセット信号、１８・・・・・・カ
ウンタ駆動クロック信号、１９−１〜１９−（ｎ−１）
・・・・・・カウントアツプデー′夕、２０・・・・・
・サンプリング信号、２１・・・・・・選択信号、２２
・・・・・・ノコギリ波Ａ１２３・・・・・・ノコギリ
波Ｂ１２４・・・・・・アナログサンプル信号。Figure 1 is a block diagram showing the configuration of a conventional digital-to-analog converter, Figure 2 is a block diagram showing an embodiment of the proposed system, and Figures 3a and b are the saws shown in Figure 2. FIG. 3 is a diagram showing an output waveform of a wave generation circuit. - 1-1 to 1-n... n-bit digital input signal, 2... gate circuit, 3-1 to 3-n...
... Resistance network input signal, 4 ... Resistance network circuit, 5 ... Analog voltage, 6 ... Amplification circuit, 7 ... Analyzer 9 output voltage, etc.
・Input data change circuit, 9... Control -
Both signal generation circuits, 10...Counter circuits, 11
......data comparison circuit, 12..., sawtooth wave generation circuit, 13...analog switch circuit, 14-1 to 14-m...reference data Selection signal, 15-1 to 1 '5-n...-n bit reference data, 116... Timing signal, 17.
... Counter reset signal, 18 ... Counter drive clock signal, 19-1 to 19-(n-1)
・・・・・・Count up day 'evening, 20...
・Sampling signal, 21...Selection signal, 22
...Sawtooth wave A123...Sawtooth wave B124...Analog sample signal.

Claims

[Scope of utility model registration request]

, an input data changing circuit that changes the digital input signal to output an arbitrary analog voltage in response to the input digital signal; a control signal generating circuit that generates a control signal; and a control signal generating circuit that generates a control signal. A count circuit that counts up a digital signal, and a data comparison circuit that compares and verifies the reference data supplied from the input data change circuit and the count up data supplied from the counter circuit; a sawtooth wave generation circuit that generates a sawtooth wave; an analog switch circuit that samples the analog signal generated by the sawtooth wave generation circuit according to a control signal from the data comparison circuit; and an amplifier circuit that amplifies the sampled analog signal. A nonlinear digital-to-analog converter comprising: