Fully Serialized Pipeline Digital Signal Processing Techniques

Geesh... announcing it before writing anything, again!

Ahem, anyway, it's very related to (one of) the research work that I've been working on for quite a while. This piece of writing is mainly about designing different types (for example, signed and unsigned integer, IEEE float, etc.) of serialized arithmetic cores, which, in this context, means adder and multiplier.

Although being slow and sometimes occupying much more space to implement, serialized logic does show its amazing properties under specific applications. As mentioned in the previous HP calculator articles, serialized logic can be implemented easily with dynamic logic, which translates to a much smaller silicon footprint.

A Typical 2 Stage NMOS Dynamic Shift Register Design

Also, when pipelined, serialized logic can show no less performance than its parallelized counterparts.

[To be done...]

 

生命迹象确认

诶……写了五千多字感想之后觉得太罗嗦又删掉了,简而言之就是,我正在败犬的道路上越走越远,这样下去我即便能够在局部取得胜利,也会走向不可避免的暴死ending。先从早睡开始,我要尝试恢复到正常状态。

我觉得自己还没被发掘到头,局部的胜利和对全局失去把握两件事同时发生那就是致命的。

To keep it short: I'm still alive and sound, with just one little problem: my daily routine is completely crushed by great pressure and many other sorts of internal troubles; it's high time I recover.

HP35: A Bit-Serial Wonder - 3. LED Magic

Part3. LED Magic

LED numeric display is the icon of HP classics. With just a single 5-bit register inserted, how could they design such a full-featured, flicker-free and properly PWM'd display that has 15 digits?

Sorry for such a long quiescence. Originally I was planning to actually make a board that drives the LED display before writing anything. Unfortunately, since quarter a year ago, I'm completely occupied by all sorts of things, and the plan is delayed forever. I'll try if I'm free at some point in the future.

This is the first article written in the new "Gutenberg" WordPress editor. Noice!

[Status: TBD]

(The top image is a part of an advertisement of HP calculators. Cropped to fit in.)

Continue reading "HP35: A Bit-Serial Wonder - 3. LED Magic"

HPJ 阅读列表 1980-1998

Hewlett-Packard Journal

- Read List -    

HP Journal为惠普帕罗奥图总部于1949年开始发行的杂志,内容主要为其最新产品的介绍,以及其实验室的最新发明的介绍与原理讲解。HPJ截至到1998年停止发行纸质刊物,历经了近50年的时光,发行了超过478本杂志,内容涉及面甚广。

惠普与美国当时许多科技公司一样,丝毫不介意让大众从最根本的地方了解自己最新发明的技术,以一种惊人的自信将其先进的理念写入每个电气工程师的心中,在做到产品推广的同时,也起到了一定的教学作用,提高了整个国家电子工业的水平。

HPJ是老惠普为人类留下的宝贵财富,虽然其中有些设计与思想处于当时时代与科技发展水平的局限,已经太过陈旧。我们电子工程师仍然能够从中挖掘到无尽的财富。例如在HP推出到至今仍是最高水准之一的HP3458A八位半台式万用表之后,HPJ拿出了一整期(1989年4月刊)从ADC、交流有效值测定算法到校准算法,详细地介绍了这款万用表的内部设计。这份刊物至今仍是高精度万用表设计入门的圣经。

因此,我决定在自己的闲暇时间,潜入这478本杂志的海洋中,把自己发现有趣的,对现在电子爱好者或者电子学习者仍有帮助的内容摘出来,做成一张表格方便大家翻阅。同时也是为我自己做一个索引,方便自己查看。

本列表仅包含1980年到1998年的157本纸质扫描版杂志,更早期的内容暂时不涉及,以后可能更新70年代的那一部分。另外因为本人知识水平有限,很多内容可能不能很好地理解,关于纯电子学以外的内容(医学、光学等)暂时不涉及太多。

Continue reading "HPJ 阅读列表 1980-1998"

intel 4004 指令集

本次介绍的是intel的4004,不过这个处理器现在已经很难买了,所以我也没有接触过实物,仅仅是用了一用模拟器
最近在学习Verilog HDL,看到网上有人做了4004的复刻,总算是可以以一种“特别”的方式来使用这个老古董了

(题图来自4004.com)

Continue reading "intel 4004 指令集"