TWI628920B - Digital to analog converter with the specified code - Google Patents
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Abstract
一種具指定編碼之數位類比轉換器包含一溫度計碼行解碼器、一溫度計碼列解碼器、一溫度計碼電流源陣列、一指定編碼解碼器及一指定編碼電流源陣列，該溫度計碼行解碼器輸出一行控制訊號，該溫度計碼列解碼器輸出一列控制訊號，該溫度計碼電流源陣列耦接該溫度計碼行解碼器及該溫度計碼列解碼器，以接收該行控制訊號及該列控制訊號，該指定編碼解碼器輸出一指定編碼控制訊號，該指定編碼電流源陣列耦接該指定編碼解碼器，以接收該指定編碼控制訊號，其中該指定編碼為一非二進制編碼。A digital analog converter with a specified code includes a thermometer code line decoder, a thermometer code column decoder, a thermometer code current source array, a designated code decoder and a designated code current source array, the thermometer code line decoder Outputting a row of control signals, the thermometer code column decoder outputs a column of control signals, the thermometer code current source array is coupled to the thermometer code line decoder and the thermometer code column decoder to receive the row control signal and the column control signal, The designated codec outputs a designated coded control signal coupled to the designated codec to receive the designated coded control signal, wherein the designated code is a non-binary code.
Description
本發明是關於一種數位類比轉換器，特別是關於一種具指定編碼之數位類比轉換器。The present invention relates to a digital analog converter, and more particularly to a digital analog converter having a specified code.
邁入數位化時代的今日，資訊多以數位訊號的型態進行傳輸，但由於數位訊號僅有低電位及高電位之間的變化，使用者並無法直接地解讀數位訊號中所包含的內容，因此，須藉由數位類比轉換器將數位訊號轉換為類比訊號，讓使用者得知訊號中的訊息為何。此外，由於當今訊號的傳遞速度不斷地朝向高速發展，使得數位類比轉換器須具備有高精度、高解析度及高速度之規格。Today, in the era of digitalization, information is mostly transmitted in the form of digital signals. However, since digital signals have only changes between low potential and high potential, users cannot directly interpret the contents contained in digital signals. Therefore, the digital signal is converted into an analog signal by a digital analog converter, so that the user can know the information in the signal. In addition, due to the rapid development of today's signal transmission speed, digital analog converters must have high precision, high resolution and high speed specifications.
電流源結構之數位類比轉換器主要是用以實現高速度的要求，二進制加權式數位類比轉換器為電流源結構中最直接的轉換方式，其藉由改變電流單元之電晶體大小，產生依二進制排列的加權電流，而能直接以二進制的數位訊號進行對應位元之電晶體的控制，使數位類比轉換器能輸出數位訊號對應大小之電流並轉換為電壓，而達成數位類比之轉換，但由於二進制加權式在中間碼的轉換過程可能會導致所有的電晶體都進行切換，例如由10000…0切換至01111…1，每個位元都改變了電位，倘若最高位元之電晶體尚未切換但其他位元之電晶體已完成切換時，輸出電流將產生突波，而影響後端電子設備。最好的解決方式是讓所有的電流單元之延遲完全匹配，但由於每個電流單元之電晶體大小不同，相當難達成這樣的設定。The digital analog converter of the current source structure is mainly used to achieve high speed requirements. The binary weighted digital analog converter is the most direct conversion method in the current source structure, which changes the transistor size of the current unit to generate binary The weighted current is arranged, and the transistor of the corresponding bit can be directly controlled by the binary digital signal, so that the digital analog converter can output the current corresponding to the digital signal and convert it into a voltage, thereby achieving digital analog conversion, but Binary weighting in the conversion process of the intermediate code may cause all the transistors to switch, for example, switch from 10000...0 to 01111...1, each bit changes the potential, if the transistor of the highest bit has not been switched yet When the transistors of other bits have been switched, the output current will generate a surge that affects the back-end electronics. The best solution is to have a full match of the delays of all current cells, but it is quite difficult to achieve such a setting due to the different transistor sizes of each current cell.
因此，另一種溫度計碼數位類比轉換器可解決這樣的問題，由於溫度計碼於數值變動時僅會改變兩個位元，而可有效地避免電流單元切換時序不一致所衍生之突波問題，但溫度計碼數位類比切換器的缺點在於其所需的電流單元極多，造成整體之溫度計碼數位類比轉換器的佈局面積難以縮小。Therefore, another thermometer code digital analog converter can solve such a problem, because the thermometer code only changes two bits when the value changes, and can effectively avoid the surge problem caused by the inconsistent current unit switching timing, but the thermometer The disadvantage of the code-to-digital analog switcher is that it requires a large number of current units, making it difficult to reduce the layout area of the overall thermometer code digital analog converter.
本發明的主要目的在於以一種非二進制之指定編碼進行電流單元的控制，可減少所需切換的電流單元數量，並搭配溫度計碼之電流源避免電流突波的產生，且由於指定編碼所需之電流單元較溫度計碼所需之電流單元少，可降低整體數位類比轉換器的佈局面積。The main object of the present invention is to control the current unit by a non-binary designated code, which can reduce the number of current units required to be switched, and cooperate with the current source of the thermometer code to avoid the generation of current surge, and because of the specified coding required The current unit requires less current cells than the thermometer code, which reduces the layout area of the overall digital analog converter.
本發明之一種具指定編碼之數位類比轉換器包含一溫度計碼行解碼器、一溫度計碼列解碼器、一溫度計碼電流源陣列、一指定編碼解碼器及一指定編碼電流源陣列，該溫度計碼行解碼器接收一行控制編碼並進行解碼而輸出一行控制訊號，該溫度計碼列解碼器接收一列控制編碼並進行解碼而輸出一列控制訊號，該溫度計碼電流源陣列耦接該溫度計碼行解碼器及該溫度計碼列解碼器，以接收該行控制訊號及該列控制訊號，該指定編碼解碼器接收一指定編碼並進行解碼而輸出一指定編碼控制訊號，該指定編碼電流源陣列耦接該指定編碼解碼器，以接收該指定編碼控制訊號，其中該指定編碼為一非二進制編碼。A digital analog converter with a specified code of the present invention comprises a thermometer code line decoder, a thermometer code column decoder, a thermometer code current source array, a designated code decoder and a designated code current source array, the thermometer code The row decoder receives a row of control codes and decodes and outputs a row of control signals. The thermometer code column decoder receives a column of control codes and decodes and outputs a column of control signals. The thermometer code current source array is coupled to the thermometer code line decoder and The thermometer code column decoder receives the row control signal and the column control signal, the designated codec receives a specified code and decodes to output a specified code control signal, and the specified code current source array is coupled to the designated code a decoder to receive the specified encoded control signal, wherein the designated encoding is a non-binary encoding.
本發明藉由溫度計碼搭配指定編碼組成該具指定編碼之數位類比轉換器，且指定編碼為非二進制之編碼，由於該具指定編碼之數位類比轉換器同時保有了溫度計碼及指定編碼優點，相較於二進制編碼之數位類比轉換器，本發明之該具指定編碼之數位類比轉換器可減少電流單元之最大切換次數，以避免因電流單元切換之延遲時間不一致而產生電流突波的問題，而相較於溫度計碼之數位類比轉換器，本發明之該具指定編碼之數位類比轉換器可降低整體之佈局面積。The invention combines the specified code with the thermometer code to form the digital analog converter with the specified code, and specifies the code to be a non-binary code. Since the digital analog converter with the specified code retains the thermometer code and the specified coding advantage at the same time, Compared with the binary coded analog-to-digital converter, the digital analog converter with the specified code of the invention can reduce the maximum number of switching times of the current unit, so as to avoid the problem of current surge caused by the inconsistent delay time of the current unit switching. Compared with the digital analog converter of the thermometer code, the digital analog converter of the present invention can reduce the overall layout area.
請參閱第1圖，為本發明之一種具指定編碼之數位類比轉換器100之功能方塊圖，該具指定編碼之數位類比轉換器100包含一溫度計碼行解碼器110、一溫度計碼列解碼器120、一溫度計碼電流源陣列130、一指定編碼解碼器140及一指定編碼電流源陣列150，該溫度計碼行解碼器110接收一行控制編碼T RC並進行解碼而輸出一行控制訊號RC，該溫度計碼列解碼器120接收一列控制編碼T CC並進行解碼而輸出一列控制訊號CC，該溫度計碼電流源陣列130耦接該溫度計碼行解碼器110及該溫度計碼列解碼器120，以接收該行控制訊號RC及該列控制訊號CC，且該溫度計碼電流源陣列130受該行控制訊號RC及該列控制訊號CC的控制。該指定編碼解碼器140接收一指定編碼S C並進行解碼而輸出一指定編碼控制訊號SC，該指定編碼電流源陣列150耦接該指定編碼解碼器140，以接收該指定編碼控制訊號SC並受該指定編碼控制訊號SC的控制，較佳的，該指定編碼S C為一非二進制編碼，以避免如先前技術所述之電流突波現象的產生。 Please refer to FIG. 1 , which is a functional block diagram of a digital analog converter 100 with a specified code. The digital analog converter 100 with a specified code includes a thermometer code line decoder 110 and a thermometer code column decoder. 120, a thermometer code current source array 130, a designated codec 140 and a designated code current source array 150, the thermometer code line decoder 110 receives a row of control code T RC and decodes to output a row of control signals RC, the thermometer The code column decoder 120 receives a column of control codes T CC and performs decoding to output a column of control signals CC. The thermometer code current source array 130 is coupled to the thermometer code line decoder 110 and the thermometer code column decoder 120 to receive the line. The control signal RC and the column control signal CC are controlled by the row control signal RC and the column control signal CC. The designated codec 140 receives a specified code S C and decodes it to output a designated code control signal SC. The specified code current source array 150 is coupled to the designated codec 140 to receive the designated code control signal SC. The designation controls the control of the signal SC. Preferably, the designated code S C is a non-binary code to avoid the generation of a current spur phenomenon as described in the prior art.
請參閱第2圖，為本發明一種具指定編碼之數位類比轉換器100的較佳實施例，在本實施例中，該具指定編碼之數位類比轉換器100包含有一輸入閂鎖器160、一時脈訊號控制器170及一行空間時脈控制器180，該輸入閂鎖器160耦接該溫度計碼行解碼器110、該溫度計碼列解碼器120及該指定編碼解碼器140，其中該輸入閂鎖器160接收一數位輸入訊號DI，且該輸入閂鎖器160分別輸出該行控制編碼T RC、該列控制編碼T CC及該指定編碼S C至該溫度計碼行解碼器110、該溫度計碼列解碼器120及該指定編碼解碼器140，該輸入閂鎖器160用以讓該行控制編碼T RC、該列控制編碼T CC及該指定編碼S C在時間上能夠同步，讓後端之該溫度計碼電流源陣列130及該指定編碼電流源陣列150可達到同步切換。 Referring to FIG. 2, a preferred embodiment of a digital analog converter 100 having a designated code is provided. In this embodiment, the digital analog converter 100 having the designated code includes an input latch 160. The pulse signal controller 170 and a row of spatial clock controllers 180 are coupled to the thermometer code line decoder 110, the thermometer code column decoder 120 and the designated code decoder 140, wherein the input latch is The device 160 receives a digital input signal DI, and the input latch 160 outputs the row control code T RC , the column control code T CC and the designated code S C to the thermometer code line decoder 110 and the thermometer code column respectively. a decoder 120 and the designated codec 140, the input latch 160 is configured to enable the row control code T RC , the column control code T CC and the designated code S C to be synchronized in time, so that the back end The thermometer code current source array 130 and the designated code current source array 150 can achieve synchronous switching.
請參閱第2圖，該時脈訊號控制器170耦接該溫度計碼列解碼器120及該指定編碼解碼器140，其中該時脈訊號控制器170接收一時脈輸入CI，且該時脈訊號控制器170輸出時脈訊號至該溫度計碼列解碼器120及該指定編碼解碼器140。較佳的，該行空間時脈控制器180耦接該時脈訊號控制器170及該溫度計碼電流源陣列130，以將時脈訊號傳送至該溫度計碼電流源陣列130。Referring to FIG. 2, the clock signal controller 170 is coupled to the thermometer code column decoder 120 and the designated code decoder 140. The clock signal controller 170 receives a clock input CI, and the clock signal control is performed. The processor 170 outputs a clock signal to the thermometer code column decoder 120 and the designated codec 140. Preferably, the row space clock controller 180 is coupled to the clock signal controller 170 and the thermometer code current source array 130 to transmit the clock signal to the thermometer code current source array 130.
請參閱第2圖，本發明之該具指定編碼之數位類比轉換器100為了在速度及佈局面積之間取得平衡，較佳的，在本實施例中，是以六位元之溫度計碼搭配六位元之指定編碼構成該具指定編碼之數位類比轉換器100，其中之六位元是以二進制編碼為定義。請參閱以下表1，為十進制、二進制及溫度計碼的對照表，表格中之二進制為3位元，其可表示十進制的8個電流大小，但相對地，該溫度計碼須以7位元才能夠表示。因此，在本實施例中，六位元之溫度計碼是用以表示64個電流大小，而具有64個電流單元，其中，該行控制編碼T RC為3位元，該列控制編碼T CC為3位元，並在該溫度計碼行解碼器110及該溫度計碼列解碼器120分別解碼後輸出8位元之該行控制訊號RC及8位元之該列控制訊號CC，以控制64個電流單元構成之該溫度計碼電流源陣列130。 <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 電流輸出值 </td><td> 二進制編碼 </td><td> 溫度計碼 </td></tr><tr><td> B<sub>2</sub></td><td> B<sub>1</sub></td><td> B<sub>0</sub></td><td> D<sub>7</sub></td><td> D<sub>6</sub></td><td> D<sub>5</sub></td><td> D<sub>4</sub></td><td> D<sub>3</sub></td><td> D<sub>2</sub></td><td> D<sub>1</sub></td></tr><tr><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td></tr><tr><td> 1 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td></tr><tr><td> 2 </td><td> 0 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td></tr><tr><td> 3 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr><tr><td> 4 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr><tr><td> 5 </td><td> 1 </td><td> 0 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr><tr><td> 6 </td><td> 1 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr><tr><td> 7 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr></TBODY></TABLE>表1 Referring to FIG. 2, the digital analog converter 100 of the present invention has a balance between speed and layout area. Preferably, in this embodiment, a six-digit thermometer code is used. The designated code of the bit constitutes the digital analog converter 100 with the specified code, wherein the six bits are defined by binary code. Please refer to Table 1 below for a comparison table of decimal, binary and thermometer codes. The binary in the table is 3 bits, which can represent 8 currents in decimal, but relatively, the thermometer code must be 7 bits. Said. Therefore, in the present embodiment, the six-bit thermometer code is used to represent 64 current sizes, and has 64 current units, wherein the row control code T RC is 3 bits, and the column control code T CC is 3 bits, and after the thermometer code line decoder 110 and the thermometer code line decoder 120 respectively decode, output the 8-bit control signal RC and the 8-bit control signal CC to control 64 currents. The thermometer code current source array 130 is formed by the unit. <TABLE border="1"borderColor="#000000"width="85%"><TBODY><tr><td> Current Output Value</td><td> Binary Code</td><td> Thermometer Code </td></tr><tr><td>B<sub>2</sub></td><td>B<sub>1</sub></td><td>B<sub>0</sub></td><td>D<sub>7</sub></td><td>D<sub>6</sub></td><td>D<sub>5</sub></td><td>D<sub>4</sub></td><td>D<sub>3</sub></td><td>D<sub>2</sub></td><td>D<sub>1</sub></td></tr><tr><td> 0 </td><td> 0 </td><td> 0 </ Td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td></tr><tr><td> 1 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td></tr><tr><td> 2 </td><td> 0 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td><td > 1 </td></tr><tr><td> 3 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td ></tr><tr><td> 4 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr><tr><td> 5 </td><td> 1 </td><td> 0 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></ Tr><tr><td> 6 </td><td> 1 </td><td> 1 </td><td> 0 </td><td> 0 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr><tr><td> 7 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td > 1 </td><td> 1 </td><td> 1 </td><td> 1 </td><td> 1 </td></tr></TBODY></TABLE> Table 1
本實施例之該溫度計碼行解碼器110及該溫度計碼列解碼器120將該行控制編碼T RC及該列控制編碼T CC轉換為該行控制訊號RC及該列控制訊號CC並以該行控制訊號RC及該列控制訊號CC控制該溫度計碼電流源陣列130之技術手段與習知技術相同，因此，本案不再贅述。 The thermometer code line decoder 110 and the thermometer code line decoder 120 of the embodiment convert the row control code T RC and the column control code T CC into the row control signal RC and the column control signal CC and The technical means for controlling the thermometer code current source array 130 by the control signal RC and the column control signal CC are the same as those of the prior art, and therefore, the present invention will not be described again.
請參閱第3圖，為本發明之該指定編碼電流源陣列150的電路示意圖，該指定編碼電流源陣列150由9個電流單元151構成，可知表示六位元之電流大小之指定編碼相較於溫度計碼所需的電流單元數量減少許多，指定編碼確實能有效地減少整體之佈局面積，但由於必須避免電流突波產生的問題，因此，較佳的，該指定編碼電流源陣列150之各該電流單元151的一電流大小分別為1i、2i、3i、4i、5i、7i、9i、14i及18i，其中i為單位電流，請參閱下頁表2，藉由本發明之指定編碼，切換最大次數及切換總次數分別為3及117，其中，由電流大小31i切換至32i為例，六位元之二進制碼是由011111切換至100000，總共改變了6個位元，而本案之指定編碼001111111切換至010110111，僅改變了3個位元，可得知本案之該指定編碼相較於二進制碼確實能夠減少電流單元的最大切換次數，以避免電流突波的產生。Please refer to FIG. 3, which is a circuit diagram of the specified code current source array 150 of the present invention. The designated code current source array 150 is composed of nine current units 151. It can be seen that the specified code representing the current of the six bits is compared with the specified code. The number of current cells required for the thermometer code is greatly reduced, and the specified code can effectively reduce the overall layout area. However, since it is necessary to avoid the problem of current surge, it is preferable that the specified code current source array 150 The current of the current unit 151 is 1i, 2i, 3i, 4i, 5i, 7i, 9i, 14i, and 18i, where i is a unit current, please refer to Table 2 on the next page, and the maximum number of times is switched by the specified code of the present invention. And the total number of switching is 3 and 117, respectively, wherein the current size 31i is switched to 32i as an example, the binary code of the six bits is switched from 011111 to 100000, and a total of 6 bits are changed, and the specified code of the case is 001111111. Up to 010110111, only 3 bits have been changed. It can be known that the specified code in this case can reduce the maximum number of switching times of the current unit compared to the binary code to avoid current burst. Generation.
本發明藉由溫度計碼搭配指定編碼組成該具指定編碼之數位類比轉換器100，且指定編碼為非二進制之編碼，由於該具指定編碼之數位類比轉換器100同時保有了溫度計碼及指定編碼優點，相較於二進制編碼之數位類比轉換器，本發明之該具指定編碼之數位類比轉換器100可減少電流單元之最大切換次數，以避免因電流單元切換之延遲時間不一致而產生電流突波的問題，而相較於溫度計碼之數位類比轉換器，本發明之該具指定編碼之數位類比轉換器100可降低整體之佈局面積。The invention combines the specified code to form the digital analog converter 100 with the specified code by using the thermometer code, and specifies the code to be a non-binary code. Since the digital analog converter 100 with the specified code has the thermometer code and the specified coding advantages at the same time. Compared with the binary coded analog-to-digital converter, the digital analog converter 100 of the present invention can reduce the maximum number of switching times of the current unit to avoid current surge due to inconsistent delay time of current unit switching. The problem is that the digital analog converter 100 of the present invention can reduce the overall layout area compared to the digital analog converter of the thermometer code.
本發明之保護範圍當視後附之申請專利範圍所界定者為準，任何熟知此項技藝者，在不脫離本發明之精神和範圍內所作之任何變化與修改，均屬於本發明之保護範圍。 <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 電流輸出值 </td><td> 18i </td><td> 14i </td><td> 9i </td><td> 7i </td><td> 5i </td><td> 4i </td><td> 3i </td><td> 2i </td><td> 1i </td><td> 切換次數 </td><td> 切換最大次數 </td><td> 切換總次數 </td></tr><tr><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td></tr><tr><td> 0 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 0 </td><td> 3 </td><td> 117 </td></tr><tr><td> 1 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 1 </td></tr><tr><td> 2 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 3 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 4 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 5 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 6 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 7 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 8 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 9 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 10 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 11 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 12 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 13 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 14 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 15 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td></tr><tr><td> 29 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 30 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 31 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 32 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 3 </td></tr><tr><td> 33 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 34 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td><td> … </td></tr><tr><td> 60 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 61 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 62 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 63 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr></TBODY></TABLE>表2 The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. . <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Current output value</td><td> 18i </td><td> 14i </ Td><td> 9i </td><td> 7i </td><td> 5i </td><td> 4i </td><td> 3i </td><td> 2i </td> <td> 1i </td><td> Number of switchings</td><td> Maximum number of switchings</td><td> Total number of switchings</td></tr><tr><td> PN </ Td><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td><td> PN </td> <td> PN </td><td> PN </td></tr><tr><td> 0 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 < /td><td> 0 </td><td> 3 </td><td> 117 </td></tr><tr><td> 1 </td><td> 01 </td> <td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td > 01 </td><td> 10 </td><td> 1 </td></tr><tr><td> 2 </td><td> 01 </td><td> 01 < /td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td ><td> 01 </td><td> 2 </td></tr><tr><td> 3 </td><td> 01 </td><td> 01 </td><td > 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td> <td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 4 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 01 < /td><td> 10 </td><td> 2 </td></tr><tr><td> 5 </td><td> 01 </td><td> 01 </td> <td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td > 01 </td><td> 2 </td></tr><tr><td> 6 </td><td> 01 </td><td> 01 </td><td> 01 < /td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td ><td> 1 </td></tr><tr><td> 7 </td><td> 01 </td><td> 01 </td><td> 01 </td><td > 01 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 8 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td ><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td>< /tr><tr><td> 9 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr ><td> 10 </td><td> 01 </td><td> 01 </td><td> 01 </td>< Td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 11 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </ Td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 2 </td> </tr><tr><td> 12 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr>< Tr><td> 13 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td> <td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 14 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 < /td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 15 </td> <td> 01 </td><td> 01 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td > 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> ... </td><td> ... < /td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td ><td> ... </td><td> ... </td><td> </td></tr><tr><td> 29 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td ><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td>< /tr><tr><td> 30 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr ><td> 31 </td><td> 01 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td>< Td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 1 </td></tr><tr><td> 32 </td><td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 01 </ Td><td> 10 </td><td> 10 </td><td> 10 </td><td> 3 </td></tr><tr><td> 33 </td>< Td> 01 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 34 </td><td> 01 </ Td><td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td> <td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td><td> ... </td></tr><tr ><td> 60 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td>< Td> 10 </td><td> 01 </td><td> 10 </td><td> 10 </td><td> 2 </td></tr><tr><td> 61 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </ Td><td> 10 </td><td> 01 </td><td> 10 </td><td> 2 </td></tr><tr><td> 62 </td>< Td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 01 </td><td> 2 </td></tr><tr><td> 63 </td><td> 10 </ Td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td><td> 10 </td> <td> 10 </td><td> 10 </td><td> 1 </td></tr></TBODY></TABLE> Table 2
100‧‧‧具指定編碼之數位類比轉換器100‧‧‧Digital analog converters with specified codes
110‧‧‧溫度計碼行解碼器110‧‧‧thermometer code line decoder
120‧‧‧溫度計碼列解碼器120‧‧‧ Thermometer code column decoder
130‧‧‧溫度計碼電流源陣列130‧‧‧ Thermometer Code Current Source Array
140‧‧‧指定編碼解碼器140‧‧‧Specified codec
150‧‧‧指定編碼電流源陣列150‧‧‧Specified code current source array
151‧‧‧電流單元151‧‧‧ Current unit
160‧‧‧輸入閂鎖器160‧‧‧Input latch
170‧‧‧時脈訊號控制器170‧‧‧clock signal controller
180‧‧‧行空間時脈控制器180‧‧‧ row space clock controller
TRC‧‧‧行控制編碼T RC ‧ ‧ line control code
RC‧‧‧行控制訊號RC‧‧‧ lines of control signals
TCC‧‧‧列控制編碼T CC ‧‧‧ column control code
CC‧‧‧列控制訊號CC‧‧‧ column control signals
SC‧‧‧指定編碼S C ‧‧‧Specified code
SC‧‧‧指定編碼控制訊號SC‧‧‧Specified coding control signal
DI‧‧‧數位輸入訊號DI‧‧‧Digital input signal
CI‧‧‧時脈輸入CI‧‧‧ clock input
第1圖： 依據本發明之一實施例，該具指定編碼之數位類比轉換器之功能方塊圖。 第2圖： 依據本發明之一較佳實施例，該具指定編碼之數位類比轉換器之功能方塊圖。 第3圖： 依據本發明之一較佳實施例，該指定編碼電流源陣列的電路圖。Figure 1 is a functional block diagram of a digital analog converter having a designated code in accordance with an embodiment of the present invention. Figure 2 is a functional block diagram of a digital analog converter having a designated code in accordance with a preferred embodiment of the present invention. Figure 3: Circuit diagram of the specified code current source array in accordance with a preferred embodiment of the present invention.
Claims (5)
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| US7369076B1 (en) * | 2006-12-04 | 2008-05-06 | Taiwan Semiconductor Manufacturing Co., Ltd. | High precision DAC with thermometer coding |
| CN101385244B (en) * | 2006-08-16 | 2011-05-11 | Lg伊诺特有限公司 | Digital-analog converter and camera module having the same |
| US8456342B2 (en) * | 2011-05-03 | 2013-06-04 | Microchip Technology Incorporated | Switch sequencing for code-range-specific linearity improvement in digital-to-analog converters |
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| CN101385244B (en) * | 2006-08-16 | 2011-05-11 | Lg伊诺特有限公司 | Digital-analog converter and camera module having the same |
| US7369076B1 (en) * | 2006-12-04 | 2008-05-06 | Taiwan Semiconductor Manufacturing Co., Ltd. | High precision DAC with thermometer coding |
| US8456342B2 (en) * | 2011-05-03 | 2013-06-04 | Microchip Technology Incorporated | Switch sequencing for code-range-specific linearity improvement in digital-to-analog converters |
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