High voltage switching circuits

An electrical circuit comprising:

• An input voltage connection to an input voltage Vin,
• An input ground connection to an input ground voltage Vss, where the peak voltage amplitude between Vin and Vss is at least 30 volts, and
• A plurality of circuit blocks (B—1, B—2, . . . , B_n, . . . , B_N), where N is an integer larger than 3 and n is an integer greater than 1 and smaller than N, and said circuit blocks (B—1, B—2, . . . , B_n, . . . , B_N) are connected in a relationship as:
• the first circuit block (B—1) is connected to a local power at a voltage Vu—1 and a local ground at a voltage Vs—1, said first circuit block (B—1) provides an output signal (S—1) that switches with a switching amplitude substantially the same as the voltage difference between Vu—1 and Vs—1, and said first circuit block (B—1) comprises a transistor (Mu—1) for providing a driving force to pull S—1 toward Vu—1 while Mu—1 is enabled and a transistor (Md—1) for providing a driving force to pull S—1 toward Vs—1 while Md—1 is enabled, where the voltage value of Vu—1 is between the voltage value of said input voltage (Vin) and the voltage value of Vs—1, and the voltage value of Vs—1 is between the voltage value of Vu—1 and the voltage value of said input ground voltage (Vss);
• the second circuit block (B—2) is connected to a local power at a voltage Vu—2 and a local ground at a voltage Vs—2, said second circuit block (B—2) provides an output signal (S—2) that switches with a switching amplitude substantially the same as the voltage difference between Vu—2 and Vs—2, and said second circuit block (B—2) comprises a transistor (Mu—2) for providing a driving force to pull S—2 toward Vu—2 while Mu—2 is enabled and a transistor (Md—2) for providing a driving force to pull S—2 toward Vs—2 while Md—2 is enabled, where the voltage value of Vu—2 is between the voltage value of said input voltage (Vin) and the voltage value of Vs—2, and the voltage value of Vs—2 is between the voltage value of Vu—2 and the voltage value of the local ground voltage (Vs—1) of the first circuit block (B—1);
• the other circuit blocks are connected following similar patterns so that for an integer n that is larger than 1 and smaller than N, the n'th circuit block (B_n) is connected to a local power at a voltage Vu_n and a local ground at a voltage Vs_n, said n'th circuit block (B_n) provides an output signal (S_n) that switches with a switching amplitude substantially the same as the voltage difference between Vu_n and Vs_n, and said n'th circuit block (B_n) comprises a transistor (Mu_n) for providing a driving force to pull S_n toward Vu_n while Mu_n is enabled and a transistor (Md_n) for providing a driving force to pull S_n toward Vs_n while Md_n is enabled, where the voltage value of Vu_n is between the voltage value of said input voltage (Vin) and the voltage value of Vs_n, and the voltage value of Vs_n is between the voltage value of Vu_n and the voltage value of the local ground voltage (Vs_n−1) of the (n−1)'th circuit block (B_n−1);
• and
• the N'th circuit block (B_N) is connected to a local power at a voltage Vu_N and a local ground at a voltage Vs_N, said N'th circuit block (B_N) provides an output signal (S_N) that switches with a switching amplitude substantially the same as the voltage difference between Vu_N and Vs_N, and said N'th circuit block (B_N) comprises a transistor (Mu_N) for providing a driving force to pull S_N toward Vu_N while Mu_N is enabled and a transistor (Md_N) for providing a driving force to pull S_N toward Vs_N while Md_N is enabled, where the voltage value of Vu_N is between the voltage value of said input voltage (Vin) and the voltage value of Vs_N, and the voltage value of Vs_N is between the voltage value of Vu_N and the voltage value of the local ground voltage (Vs_N−1) of the (N−1)'th circuit block;
• and
• said output signals (S—1, S—2, . . . , S_n, . . . , S_N) are connected to the inputs of transformer(s) or decoupling circuit elements.